PYREX Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim,Borosilicate Glass Flask – Premium Glass Chemistry Flask for Laboratory, Classroom or Home Use,PYREX Chemistry Glassware, Multipack, Set of 5

This is a high-quality product that performs exceptionally well in a variety of laboratory settings. There were no defects or imperfections, and the flask handled extreme temperature changes with ease, providing reliable and consistent results. Its durable construction and precise design make it a dependable choice for anyone needing a robust, versatile flask for scientific work. I highly recommend this flask to anyone in need of a top-tier laboratory tool.

I have several sets of these and use them for a lot of stuff, none in a science lab or classroom. Unless you count my kitchen as a science lab. They (with cork stoppers) currently hold water, taco sauce from a taco kit, and homemade salad dressing in the fridge, M&Ms, peanuts and almonds on my counter, and flowers in my living room. The tiny one makes a really cute bud vase. With my soapstone countertop and these and beakers holding various foods, I guess I do kind of have a Breaking Bad kitchen! These are good quality and fun to have around.

This starter pack can be put to use by any novice or expert alike. With pinpoint measurements from 50mL to 1000mL, these little guys truly pack a punch when precision is required. The durability of Pyrex is also a huge selling point, as they are pretty well shatter resistant. After transferring my pack from room to room, one fell out of my grasp and landed flat on concrete from five feet. Expecting an explosion of glass, to my amazement there it bounced and landed flat with no issue. Recommend to all!

Good flasks to work with, just make sure you have thee brushes to clean them

Great for beer experiments! Starters, wild culturing and dreg storage.