Glass test tubes for science, kitchenware, crafts, gifts, wedding decorations or product display. Our tubes are thick-walled borosilicate glass that are food safe. All come with round bottoms and are machine washable. Thick reinforced rims & optional tall tapered corks ensure airtight stoppering or make convenient hanging plant propagation stations. Indigo test tubes are completely blank top to bottom for custom branding.
Buy just a few of one or more sizes to try out your cool idea & then get them in bulk with 50% off wholesale pricing. Save even more with our cork stopper bundles.
Indigo brand glass tubes which come in a variety of sizes and with uniform wall thickness. All are made with borosilicate glass for thermal shock & chemical resistance. They are inexpensive enough to be used as disposable test tubes for candy storage, tissue culture or general bacteriological work but high enough quality for all your lab equipment needs. These thick walled test tubes are guaranteed to withstand high temperatures up to hundreds of degrees.
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...in Reviews on Google Places. Some are excerpts. Read the whole review by clicking on the names of the reviewers.
Deshana Barua: I brought some glass tubes to display my propagations and replace a broken one. Their prices are very reasonable (it’s impossible to buy just a single piece from online retailers like Amazon, which I’d rather not support anyway) and they processed my order and shipped very quickly. They arrived well-packaged with no broken glass and appear to be well-made.
Holly Christensen Ordered 15 test tubes. Very well packaged, quick delivery times, high quality test tubes that feel great. Thanks for the great service!
Anna Hovius I was pleased with the response that I got at Indigo Instruments - very helpful, very courteous and polite. I really appreciated the way you handled my very small purchase - like it was a... more
Lindsay McLennan Great service! I forgot to order the corks with my tubes and they had them shipped out that day and arrived at my door within 4 days! WOW! Great company to deal with. Happy to have found them before the Christmas Season arrives, as we are making these adorable Reindeer hot chocolate gifts. Thank you!
Lisa Harpster We love Indigo Instruments! They are super responsive, fair pricing, flexible and they are total problem solvers.
Borosilicate glass, sometimes referred to as "pyrex" is standard in lab glassware. It's resistant to thermal shock and is food safe because it is completely LEAD FREE compared to glass used in cut crystal, etc.!
See the tables below for physical characteristics. The first row lists the coefficient of linear thermal which is the best indicator for resistance to thermal shock . It is roughly1/3 of soda lime glass, the type most commonly used in food & drink.
|Borosilicate Glass Properties - Physical Data|
|Physical Performance||Numerical Value||Unit|
|Coefficient of mean linear expansion (20°C; 300°C)||3.3 ± 0.1||10-6K-1|
|Transformation Temperature||525 ± 15||°C|
|Softening Point||820 ± 10||°C|
|Working Point||1260 ±20||°C|
|Density at 20°C||2.23 ± 0.02||g/cm3|
|Mean Thermal Conductivity (20°C-100°C)||1.2||w/rn2k|
Glassware cannot be returned for any reason; this is for your safety and ours. It would be prohibitively expensive to test for bacteriological, chemical or radiological agents since there is no way to tell if glass has been contaminated just by looking at it. We would have to throw it away even if you claim to never have opened the package.
However, if the item is broken or clearly defective such as severely or chipped upon arrival, send us an image & we will refund you.
Handle glassware with care & personal protective equipment (PPE) - goggles & gloves because:
All our rimmed test tubes are made with heat resistant borosilicate glass. They are also thicker than cheaper flint glass culture tubes to resist breakage. All our test tubes are available with cork tops in bulk quantities.
Disposable test tubes are typically made of plastic such as polystyrene or lime/flint glass. All Indigo test tubes are made of thick walled heat resistant borosilicate glass. All sizes larger than 13mm diameter only come with reinforced rims for repeated stoppering unlike cheaper rimless culture tubes.
Indigo borosilicate glass test tubes are dishwasher & food safe. We recommend you wash the test tubes before using with food/beverages.
We offer small tubes, 13x100mm (1/2x4") up to 38x200mm (1.5x8"). The capacity or volume of these range from our smallest at 8mL to largest which hold 165 ml (0.3 to 5.5 fl. oz).
Our glass test tubes are for sale on-line for immediate shipment. Suitable for science, crafts, packaging & more. Buy one or by the box as test tubes only or as test tube/stopper combos for big savings. We don't sell thin walled, easy to break, cheap test tubes!