Our 20oz skinny tumbler comes with a BPA Free spill-proof easy-close slider lid, a reusable mental straw and a straw brush for easy cleaning of the straw. This insulated tumbler is made of food-grade 18/8 lightweight stainless steel, double walled and vacuum insulated. Choose our Skinny Tumbler for insulation, durability, and style. Stay refreshed on-the-go and enjoy your beverages at their optimal temperature. Our tumblers are ideal for any cold or hot drink like water, coffee, juice, milk, wine, champagne, cocktail, smoothie, milkshake, beer, soda, lemonade, ice cream, and other beverage. These insulated water bottles can be used at home, in the office, outdoor parties and events like sports, traveling, camping and driving, right for office workers, drivers, students, teachers, BBQ experts, party favors, sailors, etc. Easy Maintenance: While not safe for microwave or dishwasher, easy to clean. We recommend hand washing with soap, water and a scratch-free sponge to preserve its quality and extend its lifespan.