1.GREAT INSULATION PROPERTIES 304 stainless steel tumbler features double-wall insulation technology that keeps drinks cold for up to 34 hours and hot for up to 12 hours. With its excellent heat retention properties, you can enjoy your favorite beverage anytime and anywhere.2.EXCELLENT LEAKPROOFThicked screw-in lid, newly upgraded 3-in-1 Slider, silicone ring on the top, ensure the cup is extremely airtight and make the cup leak a thing of the past. This makes it the travel companion, as it won't leak even when shaken or accidentally poured. sealing is also essential for heat preservation.3.CUPHOLDER FRIENDLY insulated tumbler with a straw is designed to fit most car cup holders, making it a choice for your daily commute or road trips. You no longer need to worry about finding a place to put your large cups in the car! It's designed for everyday use and is for home, office, gym, travel.4.HUMANIZED DESIGN CUP 40oz water tumbler comes with 1x silicone straw, 1x cleaning brush, and 1x straw with silicone tips on both ends - a very humanized design. The silicone tips protect your mouth and the inner wall of the cup. Additionally, the 40oz water tumbler has an ergonomic and comfortable grip, making it easy to carry the tumbler filled with ice water anywhere.5. 40oz tumbler provides a variety of colorful color choices, making it the gift for your family, friends, colleagues, or lover.