I waited a few months to review the 40-oz teakwood bottle to decide if the size worked for me. It’s neither heavy nor awkward to drink from, but don’t try it while driving. This bottle is perfect while playing tennis or golf, at the beach or on a boat, and during family car trips in the Florida heat — any time you need cold water. Before this bottle, I carried two smaller bottles everywhere, so I’m thankful S’well offered a new size. Also, water stays cold almost 2 days. Please add a few more colors, such as coral and speckled earth/moon.