Review on Leak-Proof Screw Cap Glass Test Tubes Set of 6, 85mm Length with 5 ml Marking, Perfect for Aquarium Water Tests - Tililly Concepts by Heather Stokes

IDK what's wrong with me but I broke all 4 tubes from my API kit. The expense of putting the cap on and off was a nuisance to me, and the hoses broke. They also leaked. I bought them to replace the screw on the lid and stronger glass. You didn't disappoint us. No leaks. No cracks. There are no problems with lids. Works well and while still glass they seem a lot less brittle.