Made of high quality 18/8 stainless steel, odorless and not easy to break. You don't need to worry about rusting even after long time use. The straw is made of flexible silicone, won't hurt your child's teeth or lips. The anti-scald silicone cover ensures your child's comfort and safety. Our drinking cups are durable enough to withstand multiple bumps and accidental drops. You don't have to worry about it breaking and hurting your child. High quality stainless steel material is more durable than plastic and glass cups. Perfect for people who often drop their drinking utensils. The crystal lid is designed with a double-ridged gasket to ensure leak-proof and spill-proof, and the liquid will not spill even if the lid is turned upside down. The two-way drink hole at the top allows you to drink directly or use a straw, and the silicone tip can be used with a straw. The cups have smooth edges and can be easily cleaned in the dishwasher. Children's School Drinking Cup is stackable. It can be stored more conveniently and easily without taking up too much space. The 6 colorful silicone sleeves help you identify if the cups belong to you. You can use them for juice, milk, ice cream, smoothies and more. Our kids drinking cups are also convenient for you to carry around, perfect for traveling, camping and more. ~