I have the Labtec Mini Wireless Optical Mouse and it stores the receiver in its base as well.

It's on sale for $23.99 at Amazon.com

It's very comfortable, though I do miss having a thumb button as on my Logitech Cordless Mouseman. It does have a scroll wheel. The batteries don't last 2 or 3 months as they say, though, at least not for me (though I now use rechargeables).