Karter Scientific 100ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251X4 (Case of 6)

My 2nd purchase from Karter Scientific. Each bottle came in its own bubble wrapped mailer. Very secure. I pressure cook these at 15 lbs for 3 hours...no problems.Thanks, Karter!

Did not verify the accuracy of the markings on the containers. Cap seal seems durable on oil based liquids.

The full bottle holds far more than 100mL; about 134mL to the brim. I measured 100mL and filled for reference. The 80/60/40/20mL graduations seem roughly correct. A graduation line for 100mL would've been nice. The glass is thicker than I expected, but I wouldn't expect this to hold up under expansion/contraction scenarios. I'm not sure how much I expect the caps to keep from leaking in all scenarios either. That said, they appear to be decent value for basic media bottle needs (just avoid rapid temp changes)

One bottle's O-ring/pour ring is defective, so it doesn't seal properly. The bottle leaks a little with the defective ring attached, and with no ring at all.The other 5 are sturdy and secure.

2 came broken were in manilla envelop which duh of course gonna break, doesnt bubble wrap exsist?