Sports Water Bottles by Hydro Flask. Details:The Travel Bottle is the best of both worlds—leakproof, 24 hours cold and cupholder compatible. Your favorite insulated 24 oz Hydro Flask bottle, in a cupholder-fit design. Drinks stay cold for 24 hours, and the Flex Straw Cap makes it easy to sip while keeping your eyes on the road and your hands on the wheel. The insulated bottle easily fits ice cubes and is dishwasher safe. Designed for seamless cupholder fit, it's right at home on the open road.