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Product Description
16mm Borosilicate Glass Test Tubes – Reliable Storage for Reagents & More
What Makes This Product Stand Out
Let me introduce you to our borosilicate glass test tube bottles. We've been making these for years now, and they've become a staple across so many industries. The 16mm size is just right for most lab and storage needs – not too big, not too small.
What really sets them apart is the borosilicate glass we use. It's tough stuff. I've seen these bottles handle sudden temperature changes that would shatter regular glass – perfect for busy labs environments where accidents happen. Whether you're storing liquid medicines in a pharmacy or essential oils in a skincare workshop, these bottles hold up.
If you've used our 16mm Glass Dropper Bottles before, You will definitely repurchase because we make products with our heart, do not cut corners, and put the needs of customers first.
Key Specifications
Material: Borosilicate Glass – This isn't your average glass. It can take temperature shocks and won't react with chemicals, which is crucial for storage.
Size: 16mm diameter – We chose this size because it fits most standard racks and storage systems, making it easy to integrate into your workflow.
Who Uses Them: We've supplied these to candy makers, gift companies, pharmaceutical labs, beverage testers, chemical facilities, and personal care brands – pretty much anyone needing reliable storage.
Sealing Options: You've got choices here – droppers, roll-ons, corks, crown caps, rubber stoppers, pump sprayers, screw caps, even easy open ends. Whatever works best for your product.
Common Uses: Liquid medicine, mineral water samples, nail polish remover, infusions, eye cream, milk samples, pills, tequila (for small batch testing), perfume concentrates, shampoo samples, skin care creams, eye drops, wine samples, essential oils – the list goes on.
Made In: China – Our factory has been perfecting glass manufacturing for over 15 years, so you're getting decades of expertise in each bottle.
Take a Closer Look
Here are some detailed photos so you can see the quality for yourself. Notice the smooth edges and consistent thickness – that's what careful manufacturing looks like:
Why Our Customers Prefer These Bottles
Built to Last: That borosilicate glass really makes a difference. I've had clients tell me they've been using the same bottles for years, even with daily use. It's much more resistant to scratches and chemical wear than regular glass – similar to how our penicillin bottles are designed to maintain sterility over time.
Seals That Actually Work: Nothing's more frustrating than a leaky bottle. That's why we offer so many sealing options. The droppers work just as smoothly as our 16mm Glass Dropper Bottles, and the screw caps create an airtight seal that keeps contents fresh for months.
Trusted Across Industries: From high-end perfume makers (who love how they preserve scent, just like our perfume bottles) to strict pharmaceutical labs, these bottles meet diverse needs. One chemical company told us they reduced waste by 30% after switching to these because nothing reacts with the glass.
How to Get the Most Out of These Bottles
Pick the Right Seal: For thick liquids like creams, go with a wide-mouth cap. For oils or reagents that need precise dispensing, the dropper works best.
Clean Them Properly: Warm soapy water works for most uses, but for pharmaceutical applications, we recommend autoclaving. Pro tip: Let them air dry completely before use to avoid water spots.
Fill With Care: To prevent overflow during the sealing process, leave a gap of about 5 millimeters at the top to avoid sudden temperature changes during the filling process. For volatile liquids, fill in well ventilated areas,
Seal Tightly: Hand-tight is usually enough, but for long-term storage or transport, give the cap an extra quarter-turn. We've tested this – it creates a better seal without damaging the threads.
Label Clearly: The smooth surface takes labels well, but we recommend using waterproof labels if they might get wet. Include not just what's inside, but also the date it was filled – helpful for tracking shelf life.
Where Our Customers Use These Bottles
Pharmaceutical Labs: They're perfect for storing liquid medications and infusions. Many clients use them alongside our penicillin bottles for a complete storage solution that meets strict industry standards.
Personal Care Businesses: From essential oils to serums, these bottles protect formulations from light and air. Several perfume makers tell us they prefer them for sampling new scents before investing in full perfume bottles.
Beverage Testing: Wineries and breweries use them for small-batch samples during development. The glass doesn't affect taste, so you get accurate flavor testing results.
Chemical Research: Labs love how the glass resists corrosion. One university chemistry department has been reordering for over five years – that's the kind of loyalty we're proud of.
What Our Customers Gain
Saves Money Long-Term: Yes, they cost a bit more upfront than plastic or regular glass, but clients tell us they replace them far less often. One cosmetics company calculated they saved 40% over three years by not having to replace cracked or degraded containers.
Protects Your Products: The chemical resistance means your formulations stay exactly as you created them. No more ruined batches because the container reacted with the product – that alone is worth the investment.
Looks Professional: There's something about glass that feels high-quality. Customers notice that, and it helps justify premium pricing. They fit right in with our Health product bottles line, creating a cohesive brand image.
Meeting Global Standards
We know compliance is non-negotiable in many industries. That's why we've invested in getting these bottles certified:
ISO 9001:2015 certified – this means our manufacturing process is consistent and reliable, batch after batch.
FDA approved for food and pharmaceutical contact – just like our 16mm Glass Dropper Bottles, so you can use them with confidence for consumable products.
CE marked – meets all European Union requirements, making them easy to import and use across Europe.
We keep all our certification documents on hand, so if your auditors need to see them, just ask. We're happy to provide whatever documentation you require.
We Can Tailor These to Your Needs
Every business has unique requirements, so we offer customization options:
Different Sizes: While 16mm is our most popular size, we can make these in other diameters. Just let us know what you need – we'll check our tooling and see what's possible.
Special Seals: If you need a specific type of closure that's not listed, talk to us. We've developed custom seals for clients with unique products in the past.
Your Branding: We can add your logo through screen printing or labeling. It's a small touch that makes a big difference for customer perception – similar to how our clients customize perfume bottles to reflect their brand.
Color Options: While clear is standard, we can produce amber glass for light-sensitive products or other colors for branding purposes. Minimum order quantities apply for colored glass.
Custom orders take a bit longer, but most clients find the wait worthwhile. Our sales team can walk you through options and lead times.
How We Make These Bottles
Quality starts from the first step. Here's a quick look at our production process:
Selecting Raw Materials: We source only high-grade borosilicate glass from trusted suppliers. Each batch is tested for purity before it even enters our factory.
Forming the Glass: Our skilled technicians use precision molds to create the 16mm tubes. We check each one for uniformity – no uneven walls here.
Annealing Process: This is where the glass gets its strength. We heat and cool it in a controlled way to remove internal stresses. Rushing this step ruins the glass, so we never cut corners here.
Adding Sealing Components: Each closure type is assembled with care. We test samples from each batch to ensure a proper seal.
Final Inspection: Every bottle is checked for defects. We look for cracks, uneven edges, or anything that might affect performance. Only the ones that pass get our stamp of approval.
It's a thorough process, but that's how we ensure consistent quality. We're proud of our production line – feel free to ask for a factory tour video if you'd like to see it in action.
What Our Customer Say
"We switched to these borosilicate test tubes after having issues with regular glass breaking in our lab. The difference is night and day. They handle our autoclave cycles without any problems, and the quality is consistent with the penicillin bottles we also purchase from KANG HUA. Our lab manager is thrilled with how few we've had to replace."
How to Place an Order
Payment Options: We accept L/C, D/P, and D/A – whatever works best for your business.
Shipping Terms: FOB, CFR, or EXW – we're flexible to your logistics needs.
Minimum Order: Just 1 set to start – great for testing before committing to larger quantities.
Shipping Methods: Ocean, land, air, or express – we'll work with you to find the most cost-effective option for your timeline.
Departure Ports: We ship from Shanghai, Qingdao, or Lianyungang – whichever is most convenient for your destination.
Our sales team is available 24/7 to answer questions and help with your order. Just reach out with your requirements, and we'll provide a detailed quote within 24 hours.
Questions Our Customers Often Ask
Q: Can these bottles handle boiling liquids?
A：After multiple uses of liquid up to 100 ° C (212 ° F) to test the sample bottle, the success rate is 99.99%
Q:Are these bottles recyclable?
A: Of course, my choice is 100% environmentally friendly glass, which has no impact on the environment.
Q: How long does a custom order take?
A: It depends on your needs. Simple customization only takes a few days, while customized size or color may take 4-6 weeks.
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
Xuzhou Kanghua Glass products Co., LTD
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