Here is a drying rack for your favorite 40 oz tumbler! 

I have tested this design with the Reduce Tumbler in the 40oz size, Hydrapeak Tumbler 40oz, and am certain it would work with the Stanley Tumblers as well. 

I added vent holes to the sides for air to dry the cup, this is the perfect size to fold a paper towel in half and set it on to dry for your next drink. 

Please post your makes in all the different colors and aesthetics!