The Contigo Byron Snapseal SS 24oz Mug is 100%
leak-proof: simply flip the cap upward to reveal the ergonomic drinking
opening, then press it back down to seal the mug completely watertight. Thanks
to double-wall vacuum insulation, this stainless steel mug holds its
temperature for hours, keeping drinks hot for up to 9 hours or cold for up to
21. It's thoughtfully designed too, with a 710 ml insulated cup made from
sturdy stainless steel and a BPA-free plastic lid, plus a soft rubberized grip
that sits comfortably in hand, perfect for coffee on the go. Cleaning is easy,
since the dishwasher-safe lid opens fully with no small parts to lose, while
the body can be quickly hand-washed.