Leak-Proof Lid--The lid is designed for dual-use. you can open the top sealing rubber ring to insert the straw. also, open the lid to drink directly, it is very easy and convenient to useHigh-Quality Material--The baby drink trainer cup made from high-quality glass material, transparent cup body with colorful graffiti, 4.07mm thickness, very thick an durableFood Grade Straw--The milk cup comes with a food-grade soft silicone straw, protects teeth and gums, prevents drinks from spilling, and makes your baby fall in love with drinking waterMicrowave Safe--The glass juice cup can be placed in a microwave oven, heat milk is very convenient, also can be placed in the refrigerator(NOTE: the lid NOT resistance high temperatures)Easy to Use--Easy to drink from, simple to clean, and durable, Contains 1 cup, 1 lid, 1 straw, Dishwasher and microwave safe, very easy and convenient to use