Patelai4 Pieces Glass Round Media Storage Glass Bottles Borosilicate Media Bottles with GL45 Blue Screw Cap for Lab Water Reagent Liquids(100 ml)

I received 3 pieces instead of 4

I had boiled water to add into my bottles so that I could put them into the pressure cooker and make my agar culture media, and as soon as the water was poured into one of the bottles, it very audibly cracked and then shattered. I had used two of them prior to this with no issues, and I used the remaining three bottles on this day as well, but 1 out of 4 bottles should not break on first contact with hot liquid. THIS IS DANGEROUS. I am now 3 days past my return window and am unable to replace this order. This is ridiculous. What if I had been working with a dangerous chemical? DO NOT BUY.

I purchased these for their intended purpose such as storing chemicals( hydrochloric acid etc.) But they do not provide a water tight seal at all and i feel unsafe using these, I need to trust the equipment I will be using is not going to leak under any circumstances, of course using chemicals that this bottle is not rated for is another store, if you have chemicals thay need to stay anhydrous and or need to he sealed as not to leak then I strongly advise against these

Got these for quick access to commonly used chemicals instead of dispensing from large containers. I was initially going to return them because they wouldn't seal and would leak if tilted. After tightening the lids to an uncomfortable degree, they stopped leaking.

Of the four bottles shipped one was shattered, making this an expensive purchase. I wanted to use these as containers for my oil painting mediums and needed a sturdy bottle with a good air tight seal. The bottles are not that sturdy, certainly not as sturdy as lab quality glassware and I've worked with lab glassware for decades. The bottle seal is pretty mickey mouse, as it has a 'gasket' of sorts at the bottle lip that comes off easily and is a hassle if you're pouring out of the bottle and the gasket pops off. If you need a quality bottle with a quality seal, I'd look elsewhere.

These are almost too sturdy. The glass is very thick. The bottom is convex on the inside so it's hard to get a stir bar spinning. You have to play around with it to get it going. The lids do not leak if they are tightened down.