316 stainless steel construction - 16 oz skinny water tumbler with food-grade 316 stainless steel - Inner wall is seamless and polished; BPA free and rust-free; easy to clean Double-wall vacuum insulation - Double-layer vacuum keeps hot drinks hot for 8 hours and cold drinks cold for 9 hours - Outer wall is sweat-free so it stays comfortable to hold with any beverage - Reliable insulation protects fingers from heat Three drinking options - Gradient vertical stripes and ergonomic grip for comfortable handling - Three drinking methods: with the lid open for direct sipping, drinking directly, or using a straw - Threaded sealing design helps prevent leaks and spills Gift and style - Vintage ribbed design offers a unique look - Ideal for birthdays, housewarming, tea sets, home bar accessories, graduations, weddings, bachelorette parties and Christmas gifts Suitable beverages - Great for boba, bubble tea, soda, water, iced coffee, smoothies, fruit juice, or any other holiday drinks Use scenarios - At work or study: keeps beverages at the desired temperature while you sip comfortably - During travel or outdoor activities: sweat-free exterior and secure lid ensure spill-resistance and easy handling - Gifting occasions: arrives as a stylish, practical present for various celebrations