How to use Slushie Maker Cup ? Step 1: Put the slushy maker cup in the refrigerator for 4~6 hours until the cup has the frost. Step 2: Pour sugary beverage or juice in the cup. Step 3: Squeeze the the cup for a 1~3 minutes. Can it be cleaned in the dishwasher ? The silicone outer cup and ice pack can only be washed by hand in cold or warm water, and the other parts can be machine-washed. What is the capacity of this cup ? The built-in capacity of this smoothie cup is 330ml . You can make your favorite drinks by yourself and enjoy this fun process. You can make a delicious smoothie with just a light squeeze. What's inside the inner bag ? It is safe and edible salt water. If the inner bag is broken, please stop using it.