NWT Owala 40oz FreeSip Stainless Steel Water Bottle, SURF’S EDGEFeatures*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