New from Thermos, the SIPP insulated tumbler features a very cool push-button open & close function. This lets you easily open, sip and close, all with one hand. Nice! Plus, and this is a big plus, you drink from anywhere on the rim, a full 360 degrees around. How convenient is that? The sleek 16-oz. tumbler is made with TherMax double-wall, vacuum-insulated stainless steel for maximum temperature retention and maximum durability. The lid is leak-proof and includes a built-in tea hook that accommodates tea bags or most loose-leaf tea infusers. The SIPP tumbler stands 8" tall and measures 3.5" in diameter.