Electric devices that warm and disperse a refillable liquid fragrance oil into the air have been on the market for over 20 years. Devices typically retail at $1.30 with refills costing around $3.50.

One 5 count pack of Glade PlugIns Air Freshener Refill, Apple Cinnamon scent, allows you to enjoy the home fragrance of a warm spiced cider Glade Apple Cinnamon PlugIns refills freshen rooms with ...