Convenient Camping Capsules - This Waterproof Toilet Paper Capsule Makes Camping Comfortable (GALLERY). Looks like the top of a 2 liter bottle with a quart baggie taped to it, then filled with toilet paper. I think I will try making this a DIY
A homemade shower with pressure. 2 gallon sprayer plus a shower head (or kitchen sprayer) and a fitting. Directions are included here. They put in 1 gallon of tap water and gallon of boiling water to get the right temp. Very clever!