20oz skinny tumbler has double-wall vacuum insulation protects temperature for hours by the pool, at the office, in your car. Never worry about bumpy commutes leaving your car a liquid mess, with a splash-proof lid. This slim tumbler is straight bottle body can be more conducive to your grip which gives you more solid grip when holding your beverage. Well-made of high-quality 304 18/8 food grade stainless steel, which is durable, anti-shatter, lead free, and rust-proof, more durable and healthier than plastic or acrylic cups.