A single Little Trees Fiber Can in the Tropical fragrance. The Fiber Can is a small canister air freshener made by Car-Freshner, the company behind the classic hanging Little Trees. Little Trees makes the can using 50% recycled Little Trees fibre and rates each can at up to 60 days of fragrance, although heat and airflow affect how long and how strongly it lasts. Open the lid to release the scent and adjust it to make the fragrance stronger or softer. It sits in a cup holder, on a shelf or under a seat, and also works well in a laundry, bathroom, garage or near pet areas at home.