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.
The plastic trash can has been around for a long time, but not the automatic types you can get today. There are many durable plastic models on the market, fitting in any room in the home or office.