5000 mL (5 Liter) Borosilicate Glass Erlenmeyer Flask - High-Volume Yeast StartersThe 5000 mL Erlenmeyer Flask is the ultimate tool for propagating massive yeast counts for high gravity batches and large scale homebrewing. Made from laboratory grade borosilicate glass, it is thermal shock resistant, allowing you to move it from a flame to an ice bath safely. Its narrow neck design is ideal for use with stir bars and stir plates, ensuring maximum oxygenation for healthy yeast cell growth. Perfect for 5 10 gallon batches of Imperial