Spray bottles are a useful thing to have around the house, but often, like pens, they only work when you hold them at the proper angle. To solve this problem, Make: Projects user Jason Poel Smith shows how to mod your spray bottle with flexible tubing and some nuts on the end, to weight it. That way, when you turn the bottle sideways, the end of the tube will twist with gravity to remain in the liquid. Genius!
Spray Bottle That Sprays in Any Direction/Position