Oof, been there. One time I used a volumetric flask for heating on a Bunsen burner. Let’s just say I learned the hard way that not all glass is made for that. Since then, I always double-check if it's borosilicate or just regular stuff. If you ever need to replace damaged items, I've found a solid place for things like pipettes, graduated cylinders, and more — they’ve got a great selection of https://gentaur.co.uk/laboratory-equipment/ that’s helped me restock without overpaying. 3