Keeping plants adequately hydrated throughout the dog days of summer is virtually a full time job. That's where this trick comes in handy. Designed to mimic a drip irrigation system, it delivers water straight to plant roots using nothing more than a plastic bottle and an orphan sock. Puncture holes around the sides, then stuff a sock in it—the fabric will absorb and retain the water, slowly distributing it to plants. Unscrew the cap and fill the bottle when you're ready to water.