Our lightweight Lexan® water bottles make it easy to stay properly hydrated when exploring land or sea. They have an ergonomic shape that's more comfortable to carry and hold, and large lids that can be removed by even mitt-covered hands. Inside, a snap-in slow-sip insert helps prevent spills; and outside, an extra-strength lid-tether conveniently attaches to belts and packs. 3 1/4" diameter x 8 3/4''H.