It has a good leak-proof effect and comfortable to touch because of it adopts thick silicone seal and non-slip wall design. With its vacuum insulated design, this mug will give it a much longer and more effective insulation time. Made with PP plastic and stainless steel material, this water tumbler is solid and anti-rust. There are S, M and L three sizes for you to choose from. This product is suitable for home, household, kitchen, dorm, etc. Item Name: Insulated Cup Material: Stainless Steel,PP Features: Multifunction, Corrosion Resistant, Heat Resistant Capacity: 360ml, 460ml, 560ml Size Details: S Size: 9cm x 11.5cm/3.54" x 4.53" (Approx.) M Size: 9cm x 14cm/3.54" x 5.51" (Approx.) L Size: 9cm x 16.5cm/3.54" x 6.5" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Insulated Cup