Marble Butter Keeper by NorproMeasures: 4" x 3. 75" x 3. 75" 10cm x 9. 5cm x 9. 5cmCapacity: 1 stick of butter . 5C A butter lover's dream! Once you start using this butter keeper, you won't settle for hard butter again! Holding up to 1 stick of butter, the water in the base seals out air to keep the butter soft, sweet and spreadable for up to 30 days without refrigeration! Simply pour approximately 1 2" 1. 25cm of water in the basin, fill the top of the butter keeper with butter,