The postmodern (Ultra Lounge) teen set included a laundry hamper. Unfortunately, since it came out before laundry appeared in the game via Ambitions, it was decorative and non-functional.
I decided to have a bash at making it functional and was able to do so. Those of you who want to tweak your hamper to actually be a hamper, please download below.
The animation for clothes falling into the hamper is a little too long, since all actual hampers in the game touch the floor, but that's not so bad, in my opinion.