Owala FreeSip - GRAYT - 24oz - NWT Features - Double-wall vacuum insulation keeps your beverages cold for up to 24 hours - Stainless steel construction offers long-lasting durability - FreeSip® lid includes a built-in straw for easy drinking - The wide mouth opening lets you take bigger swigs and easily fits ice cubes - The lid flips open with a button and locks shut for easy transportation - Leak-proof design helps avoid any unwanted messes and spills - Hinged loop flips up for easy carrying and tucks away when not in use - Base fits most cup holders - BPA and phthalate free