This tumbler features a multi-function lid for sipping with or without a straw. It offers double-wall stainless steel vacuum insulation, keeping drinks cold for up to 29 hours. All parts are BPA-free, with a top-rack dishwasher-safe lid and a hand-washable body. Price drops from $34.99 to just $16.35. Shipping is free for Prime members. Else, it adds $6.