500 mL Erlenmeyer Flask

Prepare healthy yeast starters for 1–3 gallon homebrew batches with the 500 mL Erlenmeyer Flask. Made from durable borosilicate glass, it withstands rapid temperature changes so you can boil starter wort directly on the stovetop and immediately chill it in an ice bath without risk of cracking. Its tapered shape promotes smooth swirling and controlled mixing, helping oxygenate wort and support strong yeast growth. The compact 500 mL volume is ideal for small-batch brewers who need efficient, manageable starter sizes. Borosilicate construction offers excellent resistance to thermal shock, making this flask reliable for repeated heating and cooling cycles. It also features a flat base compatible with most magnetic stir plates to maintain constant agitation for improved yeast propagation and consistent fermentation performance. For best results, sanitize before use, leave extra headspace when boiling starter wort, and pair with a stir plate to maximize yeast cell development. This flask su