Huanyu 90mm High Borosilicate Glass Petri Dishes Bacterial Culture Dishes, a Pack of 5PCS

I just opened the package. Immediately I was greeted by a friendly insert that itself wasn’t just paper but higher quality plastic and well done. I was surprised by this. Then the packaging itself was serious business. They don’t cheap out. instantly i liked this company.

Ottimo prootto, non sono sovrapponibili, per lo meno non sono ermetiche se sovrapposte. Taglie diverse ma il prodotto è ottimo.

As other reviewers pointed out, the difference in size between the two pieces of the dish is probably bigger than you're used to--the smaller half can slide around a bit when the the petri dish is closed. It's really not a big deal and doesn't affect sterility since you should be incubating or storing them with the medium on top ("upside down") once it's set anyway. Because the bigger dish also has a lip that is longer than the entire height of the lower dish, they can be slightly tricky to pick up when you're pouring (but again, most of the time it won't matter because once it's "upside down," you just grab the bigger dish anyway). I have had them a few weeks and have broken two big halves by accidentally dropping them onto the floor a few feet (the smaller halves survived, maybe because they had the agar in them to absorb some of the energy). So they can be a little delicate, but overall it would probably be a waste to make a thicker petri dish. I have dry-heat sterilized these several times at 170 C for 1 hour with no problems at all. Overall, these pay for themselves over plastic petri dishes once you get about 5 uses out of them and other borosilicate petri dishes are a lot more expensive, so this is probably your best bet if you're a cheapskate like me. :)

Sehr gutes Produkt mit versandsicherer Verpackung.

Used for looking at Veda Austin’s ideas on water structure