Summit Creative Medium Rolltop Camera Backpack Tenzing 30L (Black) — Grant Swinbourne Photography
Peak Design Everyday Backpack 30L (Ash Camera Bag V1)– backpacks4less.com
Amazon.com : iROCKER Outdoor Backpack Cooler or Dry Bag, Insulated, Leakproof, Soft and Collapsible with Padded Straps and Waist Belt, 30L Capacity fits up to 24 cans or 18 Bottles - 18"-24"