Woot offers Slushy Cup, (Pink) for $14.02 (orig. $20.03). Free shipping for Prime Members.

Product Description:
Built-in freezing liquid, transforms your favorite sugary drinks (such as cola and juice) into fresh slush in just a few minutes. Made of BPA-free, food-grade silicone, environmentally friendly and healthy. All parts are non-toxic. This frozen magic machine is 100% safe for you and your children. It's washable and reusable. Without complicated steps, you just have to put it in the freezer for 4 to 5 hours, then pour in any drink you like, squeeze it, then you can try the delicious slushies. Perfect with juice or soda, or you can add milk to make a thick milkshake or ice cream. Everyone can make milkshakes at home and enjoy the process. Great creative gift for family, friends, co-workers, classmates and children. The spoon connected to the straw can be used as a spoon or as a straw. Pour in any drink you like, such as juice or soda, etc. and squeeze it. In just 2 minutes, you get slushied. Use it to personalize your own cold drink.