Gel Ice Packs Explained: A Cold Chain Buyer's Primer

Gel ice packs are reusable, sealed cooling units filled with cooling gel, super absorbent polymer (SAP), CMC, or phase change material (PCM); they absorb heat and help maintain a low-temperature environment inside insulated boxes, cooler bags, and cold chain packaging. Jisi Cold Chain (Changzhou Jisi Cold Chain Technology Co., Ltd.) is a China-based manufacturer that specializes in gel ice packs, phase change material (PCM) ice plates, cooler boxes, and VIP (vacuum insulation panel) panels.

Why gel ice packs matter: the problem they solve

Temperature-sensitive products — food, beverages, vaccines, medicines, and biological samples — can spoil, lose potency, or fail regulatory checks when exposed to temperatures outside their specified range. Cold chain logistics keeps goods within a defined thermal envelope from production to delivery. Gel ice packs are one of the most widely used passive cooling media for this task: they are pre-frozen or pre-conditioned, placed alongside the goods in an insulated container, and absorb heat during transit without any external power source.

The practical challenge for buyers is that the term “gel ice pack” covers many formats — ice cooler bricks, large cooler ice packs, ultra-thin packs, lunch packs, PCM plates, fan packs, and mini packs — with different materials, freezing points, and certifications. Choosing the wrong format can result in temperature excursions, spoiled goods, or rejected shipments. This guide explains what gel ice packs are, how they are built, which types are available, and how to evaluate them for food and medical cold chain projects.

Industry background: a market driven by food and medicine cold chain

The cold chain market context explains why gel ice packs are a procurement-relevant category. The Business Research Company valued the global gel ice pack market at USD 14.56 billion in 2025, driven significantly by chronic pain management and pharmaceutical cold chain demands. Market Research Future, using a narrower reusable-icepacks definition, estimated the market at USD 1.962 billion in 2024, with expectations to reach USD 2.862 billion by 2035. These different figures reflect category definitions — consumer cooling versus medical cold chain infrastructure — so buyers should compare product specifications rather than rely on market labels alone.

Health and medicine is a growing demand driver. MarketsandMarkets projects the vaccine storage equipment market, including cold boxes and carriers, to grow from USD 0.86 billion in 2024 to USD 1.21 billion by 2029. Phase change material (PCM) packs, valued at USD 476 million in 2025 with a CAGR of 4.5% according to Intel Market Research, are gaining attention for precise thermal management of biologics. For organizations shipping vaccines, the World Health Organization's PQS performance specification E004/VC01.2 defines performance standards for vaccine carriers and cold boxes, requiring verified cold-life durations.

China is a primary manufacturing base for this category. Dataintelo reports that China accounts for over 11.2% of global gel ice pack revenues as of 2025, serving as a primary manufacturing hub for export to North America and Europe. Jisi Cold Chain is one such manufacturer: its phase change material ice plates are available with phase-change temperature points at -30, -25, -15, -10, -5, 0, 2-8, 18, and 23 degrees Celsius, covering refrigerated transport needs for ice cream, food, vaccines, and drugs. Its cooler boxes are built with PU or VIP panels; combined with PCM ice plates, cold life can last 12, 24, 48, 72, 96, or even 120 hours depending on the configuration.

What is a gel ice pack? Materials, construction, and how it works

A gel ice pack is a sealed plastic container filled with a cooling medium. Jisi Cold Chain constructs its gel ice packs with an outer shell of food-grade HDPE (high-density polyethylene) and an inner liquid of SAP (super absorbent polymer), CMC, or cooling gel. All materials used are non-toxic. The company holds FDA, SGS, and MSDS reports stating that the materials are food-grade and safe for food storage.

Two cooling mechanisms are used across the range:

• Standard gel ice packs. The frozen gel absorbs heat and gradually warms. The effective cooling temperature depends on the freezer set point and pack volume. For example, the Jisi Cold Chain BH084 large cooler ice pack (33 × 22.5 × 2 cm, 1000 g) is available with freezing points of 0-8°C, -10°C, -15°C, -18°C, -20°C, or -25°C.
• PCM ice packs. Phase change material freezes at a fixed temperature and holds that temperature while melting. This matters for biologics and vaccines that require a stable thermal window. Jisi Cold Chain's BH091 PCM ice cooler brick, for example, is a food-grade PCM brick designed for outdoor frozen use at -22°C.

Insulation is the third variable. Vacuum insulation panels (VIP) and PU foam reduce heat transfer into the package; Jisi Cold Chain's 42 L medical cool box (model JS-42L) combines PU with a vacuum insulation panel and achieves a thermal conductivity below 0.0025 W/m·k.

Types of gel ice packs: the Jisi Cold Chain product range

Jisi Cold Chain manufactures gel ice packs in multiple formats for the cold chain transportation industry. The main categories and representative models are listed below.

• Ice Cooler Brick — BH047 is a reusable ice pack designed for food keep fresh scenarios, made of food-grade HDPE outer material with cooling gel inside (23.5 × 19.5 × 3 cm, 1000 g). BH091 is a food-grade PCM ice cooler brick for -22°C frozen use (38.5 × 20 × 2 cm, 1200 g), filled with SAP CMC inside an HDPE shell.
• Large Cooler Ice Packs — BH084 (33 × 22.5 × 2 cm, 1000 g) supports freezing points from 0-8°C down to -25°C. BH108 (35 × 22 × 3 cm, 1200 g) is a large cooler ice pack with a handle, filled with cooling SAP/CMC/PCM.
• Ultra Thin Ice Pack — BH073 (18.5 × 17.5 × 1.2 cm, 260 ml) and BH066 (19 × 12.5 × 1 cm) are thin HDPE packs filled with SAP or CMC, designed for cooler bags where space is limited.
• Lunch Ice Packs — BH024 (130 ml, 12.2 × 12.2 × 1.2 cm) and BH025 (13.3 × 12.7 × 1.3 cm, 160 g) fit slim lunch bags for food keep fresh use.
• Cool Bag Ice Packs — BH009 is a blue portable reusable freezable gel cold pack (200 ml, 16.5 × 10 × 2 cm, HDPE with SAP). BH162 is a portable reusable nylon cooler PCM gel ice pack available in 250 ml and 500 ml capacities.
• Fan Ice Pack — BH050 (350 ml, 16.5 × 10.2 × 3 cm) is designed for ice cream cart food frozen applications; bh065 (600 ml, 18.5 × 11.7 × 3.3 cm) uses a hard HDPE shell with cooling powder.
• Mini Ice Packs — BH011 (100 g, 10.8 × 5.8 × 2 cm) is BPA-free, non-toxic, and reusable; BH014 (150 g) uses phase change material technology and supports OEM promotional use.
• Breast Milk Ice Pack — BH004 is a gel ice pack with dimensions of 21 × 10 × 5.2 cm; BH125 (21 × 12 × 4.5 cm, 505 ml) is available in blue, pink, purple, white, red, or custom colors.
• PCM Ice Pack — BH130 is an OEM hard plastic PCM ice pack with 2600 ml capacity (46 × 32.5 × 2.5 cm) for cold chain use.
• Professional freezer packs — BH055 (16.5 × 9 × 1.8 cm, 200 g) is a reusable gel-filled freezer pack.
• Medical Cool Boxes and VIP Boxes — JS-42L (42 L, 2-8°C) is a vaccine cooler box / medical transport box built with PU + vacuum insulation panel. BWX42L is a -20°C thermal insulation panel box with 42 L capacity for medical blood, vaccine, and food, offering a 40-hour cold time.

Step-by-step: how to select gel ice packs for a cold chain project

1. Define the temperature requirement. Standard gel packs offer variable freezing points (Jisi Cold Chain offers 0-8°C, -10°C, -15°C, -18°C, -20°C, and -25°C options on BH084). PCM packs offer fixed phase-change points at -30, -25, -15, -10, -5, 0, 2-8, 18, and 23°C for stable thermal windows.
2. Define duration and insulation level. A cooler box with PU or VIP panels can hold temperature for 12 to 120 hours depending on configuration; the 42 L VIP box maintains -20°C for 40 hours.
3. Select the format. Use ice cooler bricks or large cooler packs for volume shipments, ultra-thin packs for space-constrained cooler bags, lunch packs for meal kits, fan packs for display carts, and mini packs for small bags and promotions.
4. Verify food contact and compliance. Confirm outer material (food-grade HDPE), inner liquid (SAP/CMC/cooling gel), and certifications (FDA, SGS, MSDS, CPSIA, CE, LFGB, or Regulation (EU) No 10/2011) against the destination market.
5. Confirm customization. Jisi Cold Chain can produce colors per PANTONE code or buyer samples, and offers silk screen printing, offset printing, or stickers. Standard packing is carton; other packing methods can be arranged.
6. Validate supplier terms. Check MOQ (usually 3,000 pieces for existing models; above 5,000 for new models), sample policy (free for existing models without printing, freight paid by buyer), delivery (samples within about 2 days; bulk 7-10 days), and payment terms.

Use cases: food, medicine, and OEM cold chain

Gel ice packs from Jisi Cold Chain are used in the cold chain transportation industry across several scenarios:

• Food keep fresh — Cooler bag and lunch bag applications use models BH009, BH024, BH025, and BH011. Mini ice packs such as BH011 are reusable and non-toxic, making them suitable for lunch boxes.
• Ice cream carts and retail displays — BH050 fan ice pack is designed for food frozen scenarios in ice cream carts; bh065 provides 600 ml capacity with a hard shell for repeated use.
• Large cooler shipping — BH084 and BH108 deliver high thermal mass (1000–1200 g) for fish, meat, and produce in large coolers. BH108 adds a handle for easy handling.
• Medical and pharmaceutical transport — The JS-42L vaccine cooler box maintains a 2-8°C window with PU + VIP insulation (thermal conductivity below 0.0025 W/m·k). The BWX42L -20°C box is designed for medical blood, vaccine, and food with a 40-hour cold time.
• Breast milk storage — BH004 and BH125 are gel ice packs designed for keeping expressed milk cool during transport.
• OEM brand programs — BH130 (2600 ml PCM ice pack) and BH066 (ultra-thin lunch chiller) support OEM production with custom colors, printing, and carton packaging.

Comparison: standard gel ice packs, PCM ice bricks, and insulated boxes

The table below compares representative Jisi Cold Chain products by function, construction, and certification. It is not a ranking; it shows how specifications map to different jobs.

For buyers comparing suppliers, public market research (Coherent Market Insights) lists Sonoco ThermoSafe (US), Cold Chain Technologies (US), and Pelton Shepherd (US) among key global participants in the reusable ice pack sector. A China-based manufacturer such as Jisi Cold Chain competes on production specifications, certification coverage, and OEM flexibility; the appropriate choice depends on the buyer's temperature requirements, volume, and destination markets.

Supplier capability: what to verify before ordering

Changzhou Jisi Cold Chain Technology Co., Ltd. was established in 2013; its predecessor, Changzhou Yang Tao Plastic Products Co., Ltd., specialized in food plastic packaging from 2006. Today the company operates from a 40,000 m² manufacturing facility with about 60 employees, including a research and development team of 4 engineers. The factory's annual output is approximately 620,000 units, with about 70% exported.

Manufacturing equipment supports the full production chain: blow molding machines form the plastic shells, injection molding machines produce lids and plastic tubes, and vacuum equipment is used for VIP insulation panels. This in-house capability supports OEM programs for colors, logo printing (silk screen, offset, or sticker), and customized packing.

Honest limits matter in supplier selection. Jisi Cold Chain's MOQ is usually 3,000 pieces for existing models and above 5,000 pieces for newly created models. Free samples are available for existing models without printing, with freight paid by the buyer. Bulk delivery typically runs 7–10 days depending on quantity, and certain standard models ship in 2–3 days. Buyers should weigh these terms against their own ordering cadence.

FAQ

1. Are gel ice packs safe for food storage?

Yes. Gel ice packs from Jisi Cold Chain use food-grade HDPE outer shells and non-toxic inner liquids such as SAP, CMC, or cooling gel. The company holds FDA, SGS, and MSDS reports confirming the materials are safe for food storage. Models such as BH047 and BH091 also carry certifications including CPSIA and Regulation (EU) No 10/2011.

2. What certifications do Jisi Cold Chain gel ice packs carry?

Certifications vary by model and can include FDA, SGS, MSDS, CPSIA, CE, LFGB, and Regulation (EU) No 10/2011. Examples: BH091 holds FDA, SGS, MSDS, CPSIA, and CE; BH047 holds FDA, MSDS, CPSIA, and Regulation (EU) No 10/2011; BH162 holds SGS, FDA, MSDS, CPSIA, and LFGB; the JS-42L vaccine cooler box holds FDA, MSDS, and CPSIA.

3. Can colors, logos, and packaging be customized?

Yes. Colors can be made according to buyer samples or PANTONE codes, depending on quantity. Printing options include silk screen printing, offset printing, or stickers. Standard packing is carton, and other packing methods can be supplied on request.

4. What is the MOQ for gel ice pack orders?

The MOQ is usually 3,000 pieces if the buyer accepts existing models. If a new model must be created, a quantity above 5,000 pieces is preferred. Custom colors and printing may also affect order minimums.

5. Can I get free samples before placing a bulk order?

Free samples are available for existing models without printing; the freight is paid by the buyer. Sample delivery is typically within 2 days. For samples with custom printing, contact the sales team to confirm terms.

6. What are typical delivery times and payment terms?

Samples are typically delivered within 2 days. Bulk orders generally ship in 7–10 days depending on quantity, and some standard models can ship in 2–3 days. For first-time orders, Jisi Cold Chain prefers T/T (30% deposit, 70% balance before shipping) or PayPal for smaller amounts; D/P, D/A, L/T, and Western Union are also accepted.

7. How do I request a quote, sample, or catalog?

Contact Ying at Jisi Cold Chain via email ying@czjmjs.com, phone 13861230192, Skype 18915806240, or WeChat 13861230192. Provide your target model, quantity, and destination market to receive a quote. A downloadable company brochure is available below. For free samples of existing models, specify the model number and confirm the freight arrangement.

Conclusion

Gel ice packs are a mature and cost-effective cooling medium, but performance depends on matching specifications to the job: temperature set point, cold-life duration, format, food-contact safety, and certifications. Jisi Cold Chain covers the main formats — gel ice packs, PCM ice plates, cooler boxes, and VIP panels — with temperature points from -30°C to 23°C and cold-life durations from 12 to 120 hours. Start with the temperature requirement, verify certifications against your destination market, and test with samples before scaling to bulk orders.

Jisi Cold Chain — Changzhou Jisi Cold Chain Technology Co., Ltd.

Website: www.cooler-icepacks.com | Email: ying@czjmjs.com | Phone: 13861230192

Factory: No.9 Chuangye Road, Henglin Town, Changzhou City, Jiangsu Province, China

Download Company Brochure

Request a free sample, get a quote, or discuss OEM requirements with the factory team.