It's the family friendly life hack that's also a sustainable solution for the environment! Eliminate the need for individual bottles of water / juice boxes that get hot in the sun and replace those with @pirani_life tumblers! Not only are these cups dishwasher safe .... THEY ALSO STACK TO SAVE ROOM IN YOUR CABINETS and COOLERS! We just add stacks of Pirani tumblers and beverage jugs to our cooler for a budget friendly solution that keeps our drinks cold all day ... and protects the environment! Shopping Pirani also supports a small Asheville based business! pirani