A travel mug full of your favorite hot coffee or tea is great on the way to work, but utterly annoying and awkward when empty and traveling home. The solution is this cool new Compresso - Collapsible Travel Mug. This inventive insulated travel mug collapses down to 1/3 of its original height when empty and easily slips into a bag or large coat pocket. It features silicone sides to keep the contents warm on the inside and your hands cool on the outside, and a spill-free twist lid on top. Unfortunately, as of this writing, it's still in development over at Quirky.com, but head on over and give it some support.
Compresso - Collapsible Travel Mug