Lowepro RidgeLine BP 250 AW - A 24L Daypack | $10 | Amazon
Lowepro’s RidgeLine backpack is a no-frills bag that’s already pretty inexpensive. Well, there’s one frill: it comes with a built in rain protector that you can pull out and cover your bag with to keep all your gadgets dry. Normally $20, this bag is down to a measly $10, so gear up.