Published March 25, 2010 02:31PM

'Sea To Summit X-Mug (Courtesy Photo)'
Jettison the bulky insulated cup. Sea To Summit’s X-Mug, a pint-size vessel made of flexible silicone, collapses into a flat, four-inch by half-inch circle that takes up virtually no pack space. $11; 2.4 oz.; seatosummit.com