1.316 Stainless Steel: We have always been committed to making y and fashionable cups. The inner and outer walls of the 16 oz skinny water tumbler are made of food-grade 316 stainless steel, The inner wall is seamless and polished, BPA and no rust, easy to clean. 2.Double-Wall Vacuum: stainless steel skinny tumbler adopts double-layer vacuum heat insulation technology, which has a powerful temperature protection function. Keep hot drinks for 8 hours and cold drinks for 9 hours. Vacuum technology makes the outer wall sweat-, no matter what beverage you drink, will not burn your fingers. 3.3 Drinking Ways: Gradient vertical stripes and ergonomic design allow you to grip the cup body while feeling comfortable. In addition, this cup is suitable for three ways of drinking. With the lid open, you can enjoy your drink to your heart's content; You can also enjoy the pleasure of drinking by drinking directly or pairing it with a straw. In addition, our cup utilizes a threaded sealing design to ensure that water does not overflow 4.Perfect Gifts: You can use it to make boba, bubble pearl milk tea, soda, water, iced coffee, smoothie, fruit juice or any other interesting holiday drinks. The vintage ribbed designs make them a unique or perfect for birthdays, house warming gifts, tea sets, home bar accessories, graduation, weddings, bachelorette parties and christmas gifts.