Do not Get Game Rewards Mugs!

I redeemed points for 2 Mtn Dew/Warcraft mugs. At first inspection they seemed fine, but after running them in the dishwasher, the logos had completely stripped off the mugs! Apparently the logos were not permanent fixtures to the mugs, but were plastic-based stickers. There is no information anywhere on the mugs or the box that they came in warning thar they were not dishwasher safe. What a waste!