These outdoor trash receptacles will often have some kind of cover that will both keep any waste inside the bin while also making the can easily accessible. Some of these covers may have flap doors in the front while others may simply have a lid with open sides.
Baking soda: This is also a good absorbent. Put a generous amount of baking soda in an uncovered container (the size of the container depends on the size of the confined area) and leave it for several days. Remove the baking soda and replace it with new one and leave it for a couple of days. Continue replacing the baking soda until it has cleared the trash can smell.