250ml Glass Erlenmeyer Flask Set, 3pcs Laboratory Glassware Flask with Glass Stopper for Chemistry Classroom Home Use, 3.3 Borosilicate Labware Science Flask, Narrow Mouth, Printed Graduation

Arraived safe and sound

The glass stoppers are hollow, so for my purposes the flasks did not work as well (pour wine in up to bottom of stopper, to eliminate oxidation of wine and allow storage without going bad).

This is a great Conical Flask, I bought 3 orders or 9 flasks all together and am very happy with the quality. I don't really see any flaws in the glass itself, so far looking at all 9 I have seen 1 or 2 small bubbles in the glass walls but nothing I would be worried about. I have a few others flasks made by different companies and these I think are my favorite. High quality glass, the are not thin at all, I have put them through there paces and no issues as of yet. I love the fact they come with a Ground-in Glass Stopper, it keeps everything air tight. Totally worth it!