For a while in the 70's, inspired by a book I'd read (maybe Nomadic Furniture, by Papanek and Hennessey) I took my showers with the drain closed. I would paddle

For a while in the 70's, inspired by a book I'd read (maybe Nomadic Furniture, by Papanek and Hennessey) I took my showers with the drain closed. I would paddle around in the ankle deep warm water and leave it in the tub until cool, thus warming my chilly bathroom and small apartment for "free".