VACUUM INSULATION: With the technology of double walled vacuum insulation, the stainless steel slim travel tumbler can keep your beverages hot for 5 hours and keep cold for 9 hours, so you can enjoy your favorite drink with this insulated slim water tumbler cup all year round. 
HIGH-QUALITY MATERIAL: These tumblers are insulated travel tumblers and made of 304 18/8 high-quality and food-grade stainless steel, which is durable, light weight, lead free, unbreakable and easy to clean.
Comes with a straw (plastic or stainless steel, whichever is in stock)