Stanley IceFlow Flip Straw Tumbler. Key features include: Material: 18/8 stainless steel, BPA-free Insulation: Double-wall vacuum insulation Straw: Leak-proof flip straw Handle: Easy-to-carry, folding handle Sizes: 30 oz Temperature Retention: Keeps drinks cold for up to 12 hours and iced for up to 48 hours Open to offers and bundle items to save! Care: Dishwasher safe