QWORK Borosilicate 3.3 Glass Erlenmeyer Flask Set (50, 100 and 250ml), 3 x Graduated Conical Flask with Glass Stopper for Lab, Experiment, Chemistry

Great glass

quality glass / frosted caps

From previous reviews, I can see where there was a concern over the toppers not being leveled enough on the bottom part. But for the most part otherwise, they still fit into the designated bottles properly so it does not concern me as much as long as they do what they are supposed to do. I'm not as concerned about the looks in such cases as much as it's function. I haven't tried them yet, but they are intended for me to process certain perfume/fragrance ingredients and are just the right sizes for them. They also seem fairly sturdy enough. I don't plan to use extreme heat, etc. so they should do well enough for what I need.

Loved this product! Got this for a science experiment for my sons class project and they worked as they claimed too! Even fell over on the car ride to school and did not break or even crack at all! Nifty!

These are cheap in price and cheap on quality. Not very well formed, the mouths of 2 of them weren't parallel to the bottoms, there's a fillet under the collar that makes using a kek clips wonky. There was a transparent spot in 2 of the 3 stoppers, where it just didn't get ground. The bottoms of the stoppers are just crudely sawed off.If they spent 1 minute more on each the fit and finish could improve 100%. Then they would have to charge more though. These are the worst peaces of glass I have but they are also the cheapest. The stoppers are 2-19's and a 24 ;) a few minutes with a grinder made them fair

Amazing product

perfect for storing oils and ingredients. The frosted topper seals perfectly

Sturdy and great value. No complaints!