Stanley Classic One Hand Vacuum Mug Vacuum insulation + thermal lid keep drinks hot 9 hours, cold 8 hours or iced 35 hours 18/8 stainless steel won't rust; naturally BPA-free Push button lid lets you open, drink, close with one hand Dishwasher safe lid disassembles for deep cleaning Leak proof and fully packable. Bike Cage Friendly Lifetime Warranty