The world of specialty tumblers seems to be growing exponentially, so how do you discern between the junk and the golden nuggets? We've already identified a great coffee option in the form of a portable press tumbler, but this tea infuser version by Aladdin ($18.99 at shopaladdin-pmi.com) offers a more gently caffeinated morning jolt.
Interestingly enough, the tea infuser's steeping cage is made of fine enough mesh to hold thick-ground coffee—probably not too intriguing an option if you take your coffee seriously. But it's meant to be a mug for tea drinkers after all, and in this vein the tumbler is a real winner. Unlike other similar products that feature steeping chambers for either bagged or loose leaf teas, the mesh ball in Aladdin's version flips up and down with the flick of a little lever on the lid's side, allowing for much more precise control of brewing intensity. The mechanism itself seems a little weak at first glance, but in my experience it has held up over repeat usage just fine.