Not so stable
These 12" glass test jars are a little disappointing in terms of their construction, but you get what you pay for. The glass is rather thin, and the tube sits down into a flexible plastic base. The base is probably a little too flexible, and while it does hold about 150ml, the jar is difficult to position perfectly vertically for easy reading, and tends to pop out of the base when moved while full of liquid. I don't see these standing up to regular use (they are being used in a college-level brewing and distillation program), and I expect the students will break these pretty quick. I'll be looking for a thicker, all-glass test jar in the future.
Reviewed by: Rich