Rotopax RX2S 2 Gallon Storage Pack
Dimensions: (L x W x H) 17.75″ x 13.25″ x 3″
Use this empty storage pack to stuff whatever you need into. Great for carrying your lunch, some dry socks, your cell phone, anything!
Each single pack holds about 2 gallons worth of stuff. You can actually cram quite a bit of useful items in here