The Stanley IceFlow Flip Straw Tumbler features bold colors and are made to keep you hydrated in a fully functional style. Ideal for car commutes or workouts at home it has a built-in flip straw for easy and effortless sipping. Snap it shut and the double-wall vacuum insulation will keep your drink extra cold for hours. To help you live a sustainable lifestyle the IceFlow Tumbler is made in part from recycled plastics sourced from discarded fishing nets sparing our waters of plastic waste. 18/8 stainless steel construction Double-wall vacuum insulation 20 oz. keeps drinks cold for up to 7 hours 30 oz. keeps drinks cold for up to 12 hours Easy-to-carry handle and built-in fence hook Fits most car cup holders BPA-free and dishwasher safe