Thanks to Crowdtap, I received a free "Litter Genie" cat litter disposal system in the mail to test and review!
After figuring out the setup (with assistance from the cat - NOT!), I realized the "Genius" part of it - used litter gets scooped into the top, then you pull a handle and it gets sealed inside a special bag. No odors!
The bag lasts quite a while but is a little pricy to replace (if all you've been using instead were Target grocery bags). Although I would like the plastic container to be a little less flimsy and to have a handle for easier carrying, the concept is, indeed, genius!