The main purpose of a shaker cup is to mix up protein shakes. But they can also be used for any drink—from juice to sports drink to iced coffee or just plain water. For protein shakes, pre-workout drinks, post-workout drinks or weight-related supplements, you need a good shaker bottle that allows you to mix the supplements well without leaving any lumps. A protein shake is a good option between meals, either as a snack or around your workout. They typically contain 25–30 grams of protein per scoop. People who exercise regularly need more protein to support muscle recovery and growth. Consume your protein at equally spaced times throughout the day.