GMP Certified Cryogenic Tubes for Lab Use – Sterile & Leak-Proof

1. Sterility That You Can Trust (No Contaminants Allowed)

Imagine thawing a sample only to find it's been contaminated with bacteria or mold. Not only does this ruin your work, but it can also lead to false research results or, in worst-case scenarios, compromise patient safety in clinical trials. That's why sterility isn't just a feature—it's the foundation of any reliable cryogenic tube.

Our tubes undergo a two-step sterilization process: first, ethylene oxide (EO) sterilization to eliminate microorganisms, followed by gamma irradiation for an extra layer of protection. Each batch comes with a sterility certificate, so you can trace exactly when and how your tubes were sterilized. And because we produce in a dust-free GMP compliant workshop, there's no risk of post-sterilization contamination during packaging or shipping.

2. Leak-Proof Design (Because Liquid Nitrogen and Samples Don't Mix)

A leaky cryogenic tube is more than just a nuisance—it's dangerous. Liquid nitrogen can cause severe frostbite, and if it seeps into the tube, it can expand when thawed, cracking the container and destroying your sample. So how do we ensure our tubes stay sealed, even at -196°C?

It starts with the (thread design). Our tubes feature precision-engineered external or internal threads that create a tight seal when closed. But we didn't stop there—each tube comes with a silicone rubber gasket, specifically designed to withstand extreme temperature changes without hardening or cracking. We've tested these gaskets through 50+ freeze-thaw cycles, and they still maintain their seal. Plus, the tube's neck is reinforced to prevent warping, which is a common cause of leaks in cheaper alternatives.

Don't just take our word for it: We perform 100% leak testing on every batch. Each tube is filled with colored dye, sealed, and submerged in liquid nitrogen for 24 hours. If even one tube shows signs of leakage, the entire batch is rejected. That's the level of rigor GMP demands—and that's the level of reliability your samples deserve.

3. Ultra-Low Temperature Resistant Material (PP Plastic: The Unsung Hero)

Not all plastics can handle the extreme cold of liquid nitrogen. Many cheaper tubes use low-grade polyethylene, which becomes brittle at -80°C and can shatter when exposed to -196°C. Our tubes, however, are made from medical-grade polypropylene (PP), a material known for its exceptional cold resistance and chemical stability.

PP plastic remains flexible even at ultra-low temperatures, reducing the risk of cracking during handling or thermal shock. It's also resistant to common lab chemicals, so you don't have to worry about the tube reacting with your samples. And because it's non-porous, it won't absorb moisture or contaminants, keeping your samples pure from start to finish.

4. A Range of Sizes and Styles to Fit Your Exact Needs

No two labs are the same, and neither are their storage needs. That's why we offer a full range of cryogenic tube sizes and designs, so you can find the perfect fit for your samples. Whether you're storing small volumes of cells or larger batches of culture media, we've got you covered.

Check out our most popular options in the table below:

Not seeing exactly what you need? We specialize in custom solutions. Need a tube with extra graduation marks? A specific color to code different sample types? Or even a unique cap design for automated storage systems? Our custom mold design for plastic bottles service allows us to create tailor-made tubes that fit your lab's unique workflow. We'll work with your team to turn your 3D drawings into a functional prototype, and we even offer free mold testing to ensure it meets your specs before full production.

Step 1: Raw Material Selection (The Foundation of Quality)

It all starts with the plastic. We source only medical-grade polypropylene from trusted suppliers who provide full material certificates. Each batch of resin is tested for purity, melt flow rate, and impact resistance before it ever enters our production line. Why? Because a single impurity in the raw material could compromise the entire tube's performance.

Step 2: Injection Molding in a Dust-Free Environment

Our production floor isn't your average factory. It's a Class 8 dust-free workshop, which means the air is filtered to remove 99.9% of particles larger than 0.5 microns. Employees wear full cleanroom suits, hairnets, and shoe covers, and all equipment is sanitized daily. This level of control ensures that no dust, lint, or other contaminants end up on your tubes during manufacturing.

Our injection molding machines are computer-controlled for precision, with sensors that monitor temperature, pressure, and cycle time to ensure every tube is identical. After molding, tubes are immediately moved to a cleanroom for cooling and inspection—no exposure to outside air until they're sealed.

Step 3: Sterilization and Packaging (The Final Checkpoint)

Once the tubes are molded and inspected, they're loaded into our EO sterilization chamber. EO gas penetrates every nook and cranny of the tube, killing even the most stubborn microorganisms. After sterilization, we aerate the tubes for 72 hours to remove any residual gas, ensuring they're safe for direct contact with biological samples.

Finally, each tube is individually packaged in sterile, peel-open bags and boxed in tamper-evident cartons. We even include a batch number and expiration date on every package, so you can trace your tubes back to their production run if needed. It's this attention to detail that makes us an iso9001 certified packaging factory —and why labs around the world trust us with their most valuable samples.

We're Specialists, Not Generalists

Unlike factories that make everything from plastic toys to food containers, we focus exclusively on pharmaceutical and lab-grade plastic packaging. That means our team has deep expertise in the unique challenges of cryogenic storage—we speak your language, and we understand your priorities.

We're Committed to Sustainability (Yes, Even in Plastic Packaging)

We know labs are increasingly focused on reducing their environmental impact. That's why we offer sustainable plastic packaging solutions, including tubes made from PCR (post-consumer recycled) plastic and recyclable packaging materials. We're also working on biodegradable options for non-sterile applications—because protecting the planet shouldn't mean sacrificing quality.

We Stand Behind Our Products (Guaranteed)

We're so confident in our tubes that we offer a 100% satisfaction guarantee. If you ever receive a batch that doesn't meet your expectations—whether it's a leak, a contamination issue, or a sizing problem—we'll ｒｅｐｌａｃｅ it at no cost. Your research is too important to take chances, and we're here to back you up.