A training mug that grows with your child. This mug set allows you to switch parts to practice with a straw, drink with a straw, and then transition to drinking from a cup. The mug parts can also be switched to a cooler bottle. ●Product Information● Product Name/Trie Mug Set Premium Target Age/From around 5 months Individual Package Size/26.3×8×19.3H(cm) Materials/Polypropylene, Silicone Rubber, Stainless Steel Set Contents/ 　・Straw Lesson Mug 　・Cooler Cup Mug 　・Straw Spout 　・2 Straws (long and short) Dishwasher safe (excluding cooler bottle) Boiling and chemical sterilization safe (excluding cooler bottle)