I have a fainting plant at work. I water it on Fridays and when I come in on Monday it's all flattened. I knew that it wasn't going to make it through the Thanksgiving break so I went to the local farm and garden store to get a waterer - but to no avail. So, I made one!
Step one: Procure a plastic bottle (if it's from the floor of your car you get bonus points because that also counts as cleaning your car).
Step two: Drill/poke a hole in the cap that's about the size of a strand of yarn.
Step three: String a length of natural fiber yarn through the hole, knotting on both sides. Leave about 1" on the inside and 8"+ on the outside. (use natural fiber, like cotton, because it has better absorbancy)
Step four: Fill bottle with water and secure cap.
Step five: Tip the whole deal upside down in the plant and tuck the string around the base, touching the dirt.
Done! Now hopefully when I get back to work tomorrow the plant will be alive and upright.