Zojirushi Stainless Steel Mug - $29.00 ($40.00)
This best-selling mug just hit the cheapest price I've ever seen. It's vacuum-insulated to keep your beverages hot or cold. What I think you'll like about it, though, is that the wide-mouthed design accommodates ice cubes so you'll never have to kick yourself for forgetting to refrigerate your summer drinks the night before.
The stainless steel means that it's sanitary and the design will save you space. For those in the mug market: You might just be in for a treat.