Kenmore and GE
I have a 65 or so Kenmore dryer with a bottle, and a 66 GE dryer with more of a capsule than a bottle----the hoses on both simply drop a few inches down the back of the drums rear exterior, sort of in the overall cabinet air that gets sucked into the heater and drum. It's very indirect scenting as opposed to directly into the drum. Gee, I wonder why everyone stopped that brilliant idea?