Mug warmers

As a wedding present for my friend, my mom knitted some mug warmers, serving two purposes: to keep the beverage (Preferably tea) warm and to keep one from burning ones hands while holding.
You can probably tell which is for her and which is for him. =)
My sister made the buttons out of Polymer clay and had them done in less than 24 hours! You can read her blog post about it by clicking Here.

( Stitch detail )

 ( Button detail )

 ( Button detail )