Amazon has the 2-Liter Pelican Marine IP68 Water Resistant Dry Bag w/ Phone Pouch (PP048992, Black/Yellow) for $18 with free shipping on $25+ or with Prime. List price: $40. Features IP68 certified waterproof, come with a 24-42 Inch single shoulder strap, 30L, 40L, and 55, equipped with backpack style shoulder straps that also come with a sternum strap for added stability.
Has excellent Amazon Reviews.
Amazon has the 2-Liter Pelican Marine IP68 Water Resistant Dry Bag w/ Phone Pouch (PP048992, Black/Yellow) for $18 with free shipping on $25+ or with Prime. List price: $40. Features IP68 certified waterproof, come with a 24-42 Inch single shoulder strap, 30L, 40L, and 55, equipped with backpack style shoulder straps that also come with a sternum strap for added stability.
Has excellent Amazon Reviews.
$18
Walmart has the SwissTech Excursion 28" Travel Duffel Bag for $15 with free shipping with Walmart+ (30-day trial) or on $35+
Amazon has the Thule Subterra PowerShuttle Travel Case for $15 with free shipping for Prime members or on $35+. Made of nylon and measures 7.09" H x 8.47" W x 2.76" D.
Amazon has the Vancropak 40" Travel Laptop Backpack for $27 with free shipping for Prime members or on $35+. Features 4 exterior side compression buckles, air-mesh ventilated back panel.
Has excellent Amazon Reviews.