A puzzle mug is a novelty that is counter-intuitive. It will customarily have considerable holes in the rim, directorial it impossible to drink from in the normal way. Frequently the solution is to cover all the holes in the rim, and then glass via another burrow in the dimpled handle.
Though at first glance a express simple object, the mug serves a number http://www.discountphotogifts.com/photomugs.html of functions which make it especially ill-fitted to holding hot liquids:
