I love my new deodorizer trash can on wheels.  It uses 4 D batteries and 13 gallon bags.  The bags tuck in securely inside of the can because of the retainer ring. It was easy to assemble and looks nice.  I purchased this model because of the built-in deodorizer.  I use it to place the individual bags of cat waste into it after I have scooped out my cats litter box each day.  This will save me from having to go to the dumpster every day.