This adorable 4 pack of Scandinavian colored hangable kids cups from Puj is the perfect way to help your little one become more independent. If you are tired of the dirty cup pile-up or constantly running to get your child a glass of water, these cups but also eliminate the need for multiple cups a day. These are BPA and PVC-free. They are made from food-grade silicone and polypropylene. They are dishwasher safe and come with 3M adhesive hooks. These work on glass, metal, tile, and fiberglass and they won't leave a messy residue which is typical of most adhesives.