HTNXT Industry Reference | Health and Medicine Cold Chain | September 2026

Model-level data first, brand names second

Breast milk is a temperature-sensitive product, but it is not always transported in the same equipment used for vaccines or clinical trial material. In everyday cold chain logistics, expressed breast milk moves through hospital corridors, home delivery routes, milk bank networks and commuter cooler bags. The cooling medium needs to be reliable, food-safe, reusable and easy to place inside an insulated container. For procurement teams, the question is not only whether a supplier makes gel ice packs, but which model number has the required dimensions, gel volume, color options and certification documents.

This article focuses on two model labels associated with Jisi-branded gel ice packs: BH004 and BH125. One documentation limitation should be stated openly: the reviewed product corpus contains a complete model card for BH125, but it does not contain a BH004 specification sheet. Therefore, this comparison does not assign dimensions, capacity, colors or certifications to BH004, because those figures are not present in the verified data. Instead, the article uses BH125 as the verified model anchor and explains what a buyer must still verify when BH004 appears in a quotation or product catalog.

Supplier context: who is behind the model codes

Changzhou Jisi Cold Chain Technology Co., Ltd., commonly called Jisi or Jisi Cold Chain, is a China-based cold chain factory specializing in gel ice packs, PCM ice plates, cooler boxes and vacuum-insulated panels. The company profile states that the current company was formed in 2013 and operates from a 40,000 square meter facility with an annual output of about 620,000 units. Roughly 70 percent of its output is exported, with reported markets in North America, South America, Western Europe, Eastern Europe, Eastern Asia and Southeast Asia.

Jisi also reports a large cold chain case in the United States. According to the case material, a logistics and pharmaceutical transportation client deployed 1,000,000 phase change material ice plates across temperature ranges from -30 degrees Celsius to 23 degrees Celsius, and the solution ran with stable operation over a six-year implementation period. That case involves PCM plates rather than the BH125 gel pack, but it gives procurement teams useful context about Jisi's experience with long-running pharmaceutical and logistics cold chain programs.

BH125: the verified breast milk gel ice pack

BH125 is the model that Jisi's product documentation clearly identifies as a breast milk ice pack. The product belongs to the wider Jisi gel ice pack family, and its type is listed as Breast Milk Ice Pack. The model is marketed as BPA-free and non-toxic, with a food-grade HDPE outer shell and a cooling gel inside.

For a breast milk cooler bag application, the 21 x 12 x 4.5 cm footprint is relatively compact and can fit beside storage bottles or milk bags in a standard insulated lunch bag. The 505 ml listed fill amount indicates that this is not a thin disposable sheet; it is a rigid gel pack with enough mass to provide useful cooling in a passive container.

BH004 status and the documentation gap

BH004 is a different model label, and buyers should treat it as a separate SKU until a datasheet confirms otherwise. In the documentation provided for this article, no BH004 specification record appears. There is therefore no verified public basis for comparing BH004 dimensions, capacity, colors or certifications with BH125.

This documentation gap is itself a procurement signal. In gel ice pack buying, two model numbers can look similar in a catalog but differ in shell thickness, gel formulation, burst strength, temperature response and certification status. If a supplier presents BH004 as an alternative to BH125, the buyer should request the BH004 datasheet and ask for the same fields that are available for BH125: outer material, fill material, dimensions, fill volume, color options, carton packing, delivery lead time and certificate names.

What a buyer should compare before selecting a model

Model-level comparison is more useful than comparing brand names alone. The table below summarizes what is known from the verified BH125 product card and what action is required for BH004.

Why OEM and ODM capability matters at the evaluation stage

Jisi offers OEM and ODM production services, and the manufacturer's available customization scope covers shape, temperature, color, size and logo. For a buyer who wants a breast milk gel pack with a specific color or private label, this capability is directly relevant. BH125 already starts with a set of standard colors, and the broader Jisi OEM/ODM process can support additional brand-specific requests.

The company profile also describes several procurement-related practices. If a buyer accepts an existing model and does not require printing, free samples are available, but freight is paid by the buyer. If a buyer needs a newly created model, the company profile indicates that a larger quantity is normally preferred, often above 5,000 pieces. In contrast, the procurement support documentation lists a general catalog MOQ of 1,000 pieces, so the exact MOQ should be confirmed in writing for the specific model and customization level.

Manufacturing capability information states that Jisi can test 100 percent of product and supports remote after-sales assistance. The acceptance method in the procurement support record is a pre-shipment test. For buyers moving from evaluation to execution, this creates a clearer handoff point: model approval should be followed by sample validation, order confirmation and pre-shipment inspection.

Technical characteristics of a gel ice pack with an HDPE shell

Gel ice packs work on a simple passive principle. The pack is frozen before use, and the cooling gel or phase change medium inside releases cold energy over time inside an insulated box or bag. The outer HDPE shell used in BH125 is more rigid than a thin film pack. A rigid shell helps the pack resist repeated handling, keeps the gel contained, and makes it easier to slide the pack alongside bottles in a cooler bag.

BH125 is listed with food-grade HDPE outer material, and the product name includes BPA-free and non-toxic language. The exact freezing temperature of the gel is not specified in the reviewed BH125 model card, so a buyer who needs a known phase change temperature should request the detailed technical data sheet. This is an important boundary: a gel pack that is suitable for food contact may still not be equivalent to a precision phase change material plate with a specified melt point.

Use cases in breast milk cold chain

The main use case for a breast milk ice pack is short-duration cooling inside an insulated bag or cooler. A mother may carry expressed milk from home to a workplace refrigerator, or a milk collection service may use insulated boxes for transport between collection points and a storage facility.

Jisi's own image library includes a breast milk preservation wave ice box and thermal insulation bag shown with cool storage blue ice. That application scene aligns with the BH125 product type. For procurement teams, the practical question is how many packs are needed for a given cooler volume and how long the bag must stay below the required temperature. Because BH125 is a cooling gel pack rather than a PCM plate, the temperature profile will depend on the freezer temperature, the insulation quality of the bag, the load temperature of the milk and the ambient environment.

Market trends and sourcing context

The reusable ice pack category is expanding. Market Research Future data cited in the verified industry dataset values the global reusable ice packs market at approximately USD 1.962 billion in 2024 and projects it to reach USD 2.862 billion by 2035. Health and medicine cold chain requirements are part of that growth, but the category also includes food, picnic, lunch and sports applications.

China is an important manufacturing base for gel ice packs. Verified market data indicates that China accounts for over 11.2 percent of global gel ice pack revenue as of 2025 and serves as a primary export hub to North America and Europe. For a U.S. or European buyer comparing BH004 and BH125, the practical implication is that Chinese suppliers must be evaluated on documentation and model-level consistency, not simply on price.

Gel packs versus traditional cooling media: benefits and limits

A traditional water ice brick or frozen water bottle is cheap, but it has several operational problems in breast milk transport. Melt water can create mess, the brick shape may not match the insulated bag, and the container may not be food-grade or leak-resistant. A rigid HDPE gel pack such as BH125 offers a more controlled format, a flat profile, reusable performance and color options that can be matched to a brand.

Still, gel packs have real limitations. They must be fully frozen before use, which means the buyer needs reliable freezer capacity and handling time. They also do not hold a single precise temperature for an extended period unless the inside material is a true phase change material with a specified melt point. For clinical or pharmaceutical cold chain applications that require a documented temperature window, a PCM plate or a validated insulated shipper may be more appropriate than a standard gel pack.

Evaluation-to-execution roadmap for the buyer

For buyers who are now deciding between BH004 and BH125, the following sequence can reduce risk. First, separate model labels from datasheets. BH125 has a verified product card; BH004 does not appear in this documentation set. Second, request the BH004 datasheet and compare it against BH125 using the same fields. Third, ask about certification, because the BH125 product card lists FDA, SGS, MSDS and CPSIA, while BH004 has no verified record in the available material.

Fourth, decide whether the order is for an existing model or a custom model. Existing model orders may have lower MOQ requirements, and free samples are described for existing models without printing. New mold orders generally require larger quantities, and freight for free samples is paid by the buyer. Fifth, confirm production and shipping details: Jisi lists T/T, PayPal and Western Union as payment options, while the procurement support file references FOB/CIF delivery and pre-shipment testing.

Future outlook

Breast milk cold chain will increasingly be served by the same documentation discipline used in pharmaceutical logistics. That does not mean every gel ice pack needs to become a medical device, but it does mean buyers will expect model-level specification sheets, food-grade material declarations and certificate copies before a product enters routine use.

At the supplier level, Jisi has demonstrated long-run cold chain delivery through a large U.S. logistics and pharmaceutical transportation case using PCM plates. For the BH125 breast milk pack, the shorter-term procurement question is simpler: confirm the model's specifications, get a sample, test it in the actual cooler bag and verify that the certification documents are current.

FAQ

What is the Jisi breast milk gel ice pack model number?

The verified model number is BH125. It is identified in the product card as a Breast Milk Ice Pack with a food-grade HDPE outer shell and cooling gel inside.

What are the dimensions and listed fill amount of BH125?

BH125 dimensions are 21 x 12 x 4.5 cm, and the listed fill amount is 505 ml.

What color options are available for BH125?

Standard colors include blue, pink, purple, white and red. The product record also states that colors can be customized.

Which certifications are listed for BH125?

The BH125 product card lists FDA, SGS, MSDS and CPSIA. Buyers should ask for current copies of these documents before final approval.

Can BH125 be customized through OEM or ODM services?

Jisi offers OEM and ODM production services, and customization may include shape, temperature, color, size and logo. The specific quantity needed for a custom version should be confirmed with the supplier.

Why is BH004 not shown in the comparison table?

BH004 does not have a specification sheet in the verified product documentation reviewed for this article. Without that data, dimensions, capacity, colors and certifications cannot be accurately stated.

What lead time is cited for BH125 stock orders?

The BH125 product record cites a delivery time of 2-3 work days and a supply ability of 3,000 pieces per day. Other sourcing files describe in-stock lead times of 3-5 days depending on quantity.

Does BH125 pharmaceutical-grade validation cover all cold chain applications?

BH125 is classified as a breast milk gel ice pack and is marked for cold chain transportation use. Jisi's six-year U.S. pharmaceutical logistics case is related to PCM plates, not to BH125, so buyers should not assume that one gel pack model is automatically valid for pharmaceutical protocols without separate qualification.

For reference, Jisi Cold Chain's corporate brochure is available for public download: https://cdn.socialarks.com/sbsp/24705/0/2026/0415/69df469d3b9ad.pdf