【TRANSITION TRAINING CUP】Designed exclusively for littles transitioning from bottle to big kid cup, these cups are the perfect size for little hands and can work as an opening cup and a straw cup for teething babies. 【SEE THROUGH WINDOW】See-thru silicone window and easy-to-read ounce markings add measurement consistency for mixing and portion control. Baby can see what is inside the cup, reducing the possibility of drinking unknown liquids and helping parents accurately grasp the baby's intake. 【SAFETY FIRST】We prioritize your baby's safety, which is why our training cup is made of 100% food-grade silicone material. Free of plastic, BPA, PVC, lead and phthalates. Soft silicone reduces potential injury to developing gum & teeth, nurturing independence and accomplishment. 【INNOVATIVE DESIGN】Inner lid ridge means fewer spills and less cleanup. Lightly weighted base provides stability from constant tipping. The straw cup is designed with easy-to-grip handles that were made for tiny hands as they learn to drink on their own. 【EASY TO CLEAN】Safe to use with cold, warm and hot liquids. Easy to clean by hand or in a dishwasher. Microwave safe, freezer safe and heat safe up to 356F/ 180C. Designed exclusively for littles transitioning from bottle to big kid cup, these cups are the perfect size for little hands and can work as an opening cup and a straw cup for teething babies.