Discover how to build a DIY mini water pump using recycled bottle caps and a small DC motor! This step-by-step tutorial shows you how to create an efficient homemade pump from everyday materials.

A: Both questions are related, so this week’s column is a two-fer. Caps and lids are recyclable in Rhode Island, when attached to the right host. Because bottles can be plastic, metal or glass, let’s ...

Do you want to design something to match existing threads on a bottle, or a cap? It turns out there’s an easier way than reaching tiredly for the calipers and channeling one’s inner reverse-engineer.