QWORK Glass Petri Dish Petri Plates with Lid, Thicken, 60mm x 18mm, 5 Pack

I ordered the QWORK Sterile Glass Petri Dish Petri Plates with Lid,5 Pack, Thicken, 90mm x 20mm. I specifically ordered these to do experiments with water memory by placing water over different images then freezing to see the results. I read that the 90 mm was the best size to use, and I ordered these as I felt they were the best option compared to many others which they are. This set has five of them along with five different covers. There definitely was a lot of thought involved to make sure they were protected in order to get their way to me, which is appreciated. Mine are a decent thickness for what I need, and they seem to be decent quality. I can tell the glass is more breakable than some other glass, but I have more than enough to last since I really only need a couple. I do not need the covers, however, I could use these for larger dishes which means I have nearly double for my work. I'm not seasoned with how petri dishes are supposed to line up, and all I can say is the cover easily goes over. The gap isn't tight, and there's a couple millimeter difference. So far they are working well, and the clarity is nice for what I need to see. I've been using one to two teaspoons of water in the dish, placing it over a picture for 30 seconds, then I keep it in the freezer for anywhere from 5 and 1/2 minutes to almost 10. There are many resources online and different people that share their techniques, and this has been very intriguing and interesting for me. I don't have any complaints, this is a fun hobby and good for all ages, thank you.

Arrived on time and in good condition; the individual dishes where individually packaged in bubble wrap in a perfectly sized shipping box. The dishes arrived very clean; very nice petri dishes.

Nice Petri dishes. One came broken.

I really wanted ceramic ramekins to keep microwaved food from splattering out of mason jars that I use for freezing individual portions of cooked food. But these were the right size and $10 less for more than twice as many dishes, so I figured I'd give them a try. I had read a previous person's review that said one of their dish covers arrived broken, and I had the same problem. You can see in the photo that they pack these dishes very carefully with bubble wrap and paper in a heavy cardboard box, but one of my dish covers also arrived broken. Another reviewer that said the glass was very thin and I must admit that I agree. I don't expect these to last long because they do feel incredibly fragile. But even with the broken cover, I still have more than twice the number of dishes than I would have if I had purchased ceramic ramekins for covering my mason jars. So, I still feel that this is a good value for the limited purpose I planned.

Thick glass, 3" diameter base, are perfect for my use. The lids are 3 5/8" in diameter which is more than ample. The lids sit on the bases. The set is well packaged to prevent breakage. The kids are wrapped in tissue.

I'm not sure whoever makes these has actually ever seen a real petri dish before. There's zero seal with a large gap all around the flimsy glass. Avoid these.

Bought these for the price. Giving 5 stars because they appear to be good quality glass - they autoclave fine. However as other people have noted there is a sizable gap making them ill suited for agar plates or do plan on using a lot parafilm to ensure they're sealed. I found it a pain and I found a pack of "20Pack Round Clear Frosted Plastic Bead Storage Containers Box Case with Screw Top Lids,Cylinder Stackable Bead Containers for Make Up,Eye,Pills,Gems,Beads,Jewelry,Small Items,2.6x1 Inches" on Amazon for twice the price but much better for mycology and they're autoclavable - although twice the price you get 4 times as many making them a better value.

For watchmaking they work great, for storing or cleaning parts, the lid is very loose.

The lid of the petri dish is not a lid but a larger petri dish, and the difference is so great that they do not seal tightly and cannot be made airtight in any other way either. It's completely pointless to try to do a protected cultivation in these "petri dishes with lids". What a joke. Do not buy! You can tape two plates together instead. That's better.

They're great, for the price (~$19cad), sturdy and not too thin. They were packaged nicely and arrived promptly. They do have quite a gap between the lid and the bottom plate but I had no issues wrapping with parafilm, it sealed just fine. They are quite big, I purchased these to cultivate slimemoulds and they will make a nice display pieces due to the size of the plate. I would probably not clone mushrooms with these because of how big they are but that may be down to personal preference. I did not have any need to pressure cook these so I cannot speak to the durability in that regard.

Just what I needed, good quality and arrived well packaged

Son perfectos. Tienen las dimensiones indicadas, el vidrio esta perfectamente lisos y transparente. Suaves y asépticos.

Three of the QWORK Sterile Glass Petri Dish Petri Plates with Lid were broken when I received these items.