Suaoki Air Compressor, $15 with code 5J32OZM2

While it’s certainly not as fast as the coin-operated air compressor at a gas station, this glove box-friendly compressor can save your bacon if you have to change a tire, or just can’t be bothered to find a bunch of quarters. One reviewer describes it as slighlty larger than two decks of playing cards, so you shouldn’t have any trouble finding somewhere to hide it.