Borosilicate Erlenmeyer Flasks for Yeast Starters | 500ml, 1L, 2L, 3L, 5L Sizes

Build better yeast starters with the right Erlenmeyer flask size, from 0.5L to 5L.

An Erlenmeyer flask for yeast starters is one of the most useful tools a homebrewer can keep on hand. Whether you are making a small starter for a fresh pack of yeast or stepping up a larger culture for high gravity brewing, these flasks make it easy to mix, swirl, and manage starter wort in a compact, brew-friendly vessel.

This flask is available in multiple sizes so you can choose the right option for your process, including 500 mL (0.5L), 1000 mL (1L), 2000 mL (2L), 3000 mL (3L), and 5000 mL (5L). Smaller sizes are great for quick starters and simple propagation, while larger sizes give you room for bigger pitches and step-up starter schedules.

Why Homebrewers Use an Erlenmeyer Flask for Yeast Starters

• Great for yeast propagation: Ideal for making yeast starters before brew day so your fermentation can start stronger and healthier.
• Multiple size options: Available in 500 mL / 0.5L, 1000 mL / 1L, 2000 mL / 2L, 3000 mL / 3L, and 5000 mL / 5L sizes.
• Easy to swirl and monitor: The classic flask shape makes it convenient to mix starter wort, keep yeast in suspension, and observe activity.
• Pairs perfectly with stir plates: A great match for brewers who want to keep yeast starters moving for better circulation and convenience.

Available Sizes

• 500 mL - 0.5L
• 1000 mL - 1L
• 2000 mL - 2L
• 3000 mL - 3L
• 5000 mL - 5L

Pair It With a Stir Plate for Better Yeast Starter Workflow

If you are building a yeast starter setup, this Erlenmeyer flask pairs nicely with a magnetic stir plate. Check out our KegLand Wort Whipper Magnetic Stir Plate or the Milwaukee Instruments Magnetic Stir Plate to keep your starter in motion during propagation.

To simplify the process even more, pair your flask with Omega Yeast Propper Starter for a fast and convenient way to prepare starter wort without extra measuring and mixing.

Who This Flask Is For

• Homebrewers making yeast starters for ales, lagers, and high gravity beers
• Brewers stepping up yeast cultures over multiple starter stages
• Anyone building a complete starter setup with a stir plate and ready-to-use starter wort

If you are looking for an Erlenmeyer flask for brewing yeast starters, these size options make it easy to match your flask to your batch size, yeast pitch, and starter method.