12PK Test Tubes, 50ml - Bakelite Screw Cap with Rubber Liner - Borosilicate 3.3 Glass - 5.9" x 1" - Round Bottom - Leak Proof - Eisco Labs

It’s great with social distancing this allows me to do whiskey tasting with the boys. Just ship off the different vials full of the different whiskeys that they are going to be trying and then join zoom meeting together and have yourself a great time.

Products came as advertised. Each tube was individually wrapped in kraft paper for protection. I have opened about all of them and they are all in tact. Used them to head chemicals to over 100 °C and tubes did not crack. There is a thin plastic foam lining in the cap that gives them a little bit of a cheap feel, but the seal of the cap was maintained even after dunking the tubes in water. Very good deal for the price.

At first glance, these appear razor thin. However, I have managed not to chip or break one yet. These hold almost exactly 50ml, slightly more.

I ordered an extra box by accident. I like these so much, I decided to keep them as spares.

very good product and it fits exactly as I wanted!It will be better if we can get spare caps.

just make sure you want a really big test tube. I got these for mycology specimens and there really much bigger than is necessary. They take up more space than they need to and they take up a lot more agar than they need to. however, I'm perfectly happy with the quality of the test tubes themselves. However, I haven't done much with them yet other than do four sample growths.

These are amazing. I made a spice rack and they worked perfectly!!

They leak-the caps

Perfect size allows easy use. Also autoclave-able. Have to remove foam lid seal as it will melt but not needed for master slants in mycology. Allows perfect gas exchange.

Solid design, screw cap seals well. Stuck these bad boys into a bandoleer and ran around at a festival pouring cocktails out of them, used others to hold spices.