Safety 1st Easy-Saver Diaper Pail - $15

This system's a snap to operate: Push a button on the lid and drop the stinky diaper in the pail. The snug-fitting lid locks dirty diapers into a sealed chamber. A replaceable deodorizing disc in the chamber keeps smells in check. (Note: While their disc works adequately, you may want to add you own air freshener on the interior chamber wall). You can use any kitchen-sized garbage bag with this unit — no expensive refill bags required. Prepare to change bags frequently, though, as this pail has a twenty-four-diaper capacity.

Playtex Diaper Genie System II - $30

This reliable brand has introduced an improved version. What's new? No more twisting, and the revamped lid flips open and closed with ease. This airtight disposal system holds up to 180 diapers. As always, the Genie does a admirable job controlling noxious diaper fumes. Sleep-deprived parents will appreciate that the Genie II comes fully assembled. Refills will rack up the operating costs (a refill pack will hold about 180 diapers and costs $6) of this unit.

Baby Trend Diaper Champ - $40

To operate the Diaper Champ, grab the "1-flip" handle and open the unit, drop the soiled diaper in, and flip the handle to trap the diaper in the pail. To empty it, just unlock the lid and remove the bag. I love that this diaper disposal system also comes in color options. But that doesn't warrant the cost. Most kitchen-sized bags will work with the Diaper Champ. Though Baby Trend touts the Champ's "improved capacity," it won't hold as much as a Dekor or a Genie.

Graco Touch Free Diaper Pail - $60

While effective at controlling odor, this is a clunky beast. Perhaps that's owing to the automatic, touch-free lid (there's also the a manual setting, which comes in handy when your batteries die). The unit comes with replaceable carbon filters — yes, they work, but like the four D batteries, they're a hassle to maintain. Any ten- or thirteen-gallon trash bags will work inside the unit.