Erlenmeyer Flasks
Most commonly used for yeast starters, flasks of either pyrex or borosilicate 3.3 can be heated directly on a flame or stove, then rapidly cooled without the glass rupturing.
Most commonly used for yeast starters, flasks of either pyrex or borosilicate 3.3 can be heated directly on a flame or stove, then rapidly cooled without the glass rupturing.