Propper Starter concentrated wort makes it easy to give your yeast the proper start when preparing high gravity brews, cold-pitched lagers, yeast packs nearing expiration and whenever a starter is recommended. No more measuring messy DME. No more waiting to boil & cool. Just mix one can with an equal amount of purified water in a sanitized flask to produce one liter of ready starter wort. For increasing biomass & vitality in your yeast, Prop It Up with a can of Propper Starter! Recommended Use: One (1) can of Propper Starter makes one liter (1L) starter.