If you're camping or have guests over, inflatable mattresses are handy. If you can't find a pump, you'll tire quickly inflating it yourself. A trash bag inflates your mattress and saves your lungs.

Anyone who rides a bike would agree that flat or low-pressure tires are a drag. But why fiddle with a pump when the tire can inflate itself? San Francisco-based startup PumpTire has invented just such ...

Air mattresses can be awesome, but if you need to inflate one and you don’t have the pump that came with it, blowing one up is a lung-busting challenge. Luckily, there are a ton of different ways you ...