Amazon.com: Two Wheel Gear - 4 in 1 Dayliner Box Bag (20 Liter) - Water Resistant Rolltop for Bike Handlebars, Rack Trunk or Basket with Shoulder Strap (Graphite Grey) : Sports & Outdoors
Ultralight Dry Sack - 20 Liter - Waterproof Gear - Osprey Packs Official Site
Black Waterproof Ripstop Backpack | 20 Liter Dry Bag
20 L Day Escape: 20 Liter Backpack Cooler | Hydro Flask
20L roll top dry bag 100% waterproof lightweight TOUGH RIPSTOP nylon with double straps - North Coast Wetsuits - NCW
MaxxHaul Water proof dry-Bag 20 Liter and 10 Liter Capacity-Bag Blue and Pink Crossbody Bag in the Bags & Backpacks department at Lowes.com