Easy to clean and the wide opening is also convenient for you to clean, convenient and practical. Material: 304 stainless steel30 oz Cup mouth: 8 cm/ 3.1 inch Cup height: 24 cm/ 9.5 inch Cup bottom: 8 cm/ 3.1 inch Color: SilverPackage includes: 12 x Insulated tumblers with lids 12 x Stainless steel straight straws 12 x Straw brushes Warm notes: Wash it before first use. Daily washing, wash by hands gently, not in the dishwasher. Due to manual measurement, please allow a slight difference in size. Due to different displays, there may be slight color differences.