A plastic pill dispenser with seven snap-open compartments slides snuggly into (and out of) a niche on the outside of a wide-mouth 20-ounce BPA-free plastic water bottle.

When I saw the Lasbottle 4-in-1 Travel Dispenser, I had to give it a go. The idea of having everything I’d need for a shower all packed into one container sounded like the ideal situation.

Glass bottles can make handy cooking oil dispensers with a pour spout attachment, similar to the ones bartenders use. A stainless steel cap with a suctioned base for the bottleneck will make a ...

Bonus: if you find oil dripping from regular glass bottle annoying, the spout or nozzle on these dispensers won't allow it. And they're all made of glass, not plastic, so they're also non-toxic.

You can't always stick around to keep your pet's water bowl full, but you can build a clever contraption that'll do the job for you. You just need a two-liter bottle, some wood, and a few minor tools.