The contigo freeflow ss powered by autoseal technology will not disappoint with 100% spill and leak-proof performance. The thermalock double-wall vacuum insulated 18/8 stainless steel will keep drinks hot up to 10 hours and cold for up to 29 hours. Accomplish more with one-handed drinking and keep out dirt and grime with a protective spout cover. The freeflow ss is easy to clean, as the underside of the lid opens for full access and both lid and body are dishwasher safe. A cross-bolt lock to prevent accidental spilling and bolted carry handle provide secure transport. Additionally, the rugged powder-coat finish gives you a textured grip even when your hands are wet or sweaty.