Tea: If you don't like coffee, you can use tea bags instead. Just place 2-3 tea bags inside the confined space. The tea leaves in the bags will not only absorb the trash can smell but will also release the natural aroma of tea.
Trash Can Smell Removal : Trash Can Cleanup: Hose down the can on a sunny day. Pour one gallon of water mixed with three cups of bleach into the rinsed trash can. Agitate the bleach and water mixture in the can. Let it sit for one hour, stirring the bleach every ten minutes. Use a long-handled brush to scrub the sides of the can. Pour out the bleach and water. Be sure you scrub the lid as well. Let the can and lid dry in a sunny spot. The ultraviolet light from the sun kills the odor-causing organisms. Be sure to let the can dry before adding any new trash.