osprey daylite expandable travel pack 26+6 Night Shift Blue The main compartment can be expanded by 6 liters when used as a standard carry Osprey Daylite Expandible Travel Pack

The brand alone might tip the scale for some of you

Great strength and knot strength

Compared to standard backpacking tents, ultralight tents are lighter and more packable (all but one of our picks weigh less than 3 pounds) and run the gamut from premium semi-freestanding designs from names like Nemo, Big Agnes, and MSR to stripped-down trekking-pole shelters and floorless pyramids from well-respected cottage brands

I use it in my boats main locker to keep water out in the Lake Erie waves, and it does

Lifewit 24L (30-Can) Soft Cooler Backpack with Hard Liner Specification: Material type: 1680D Oxford, Keep food cold: 12 hours, Features: Water-Resistant , Capacity: 24L, Coming in as the cheapest from the selection at a price to suit most budgets, the Lifewit Soft Cooler Backpack with Hard Liner has a capacity of 24 litres and I have to say in the year Ive owned and used this I have found it to be a joy certainly not an obvious budget pick keeping bottles of Prosecco cool for hours