Here is a good deal on a set of really nice Bohm insulated tumblers. You can get 2 for $19. Shipping is $3 so- $22 shipped.
These double insulated cups hold 13 ounces of cold or hot beverages. My favorite feature is that they are microwave and dishwasher safe because often travel mugs are not.
Choose from black, lime or white. These might make a nice gift idea. Head over here to take a look at the Bohm tumblers. They were toward the bottom of the page for me.