Volume is the biggest thing I am constantly trying to pare down as well. Cheap synthetic sleeping bag, vs expensive down quilt is a big difference in total volume. Extra clothing/rain gear also eats up volume. A sawyer squeeze vs a katadyn pump is one area where I can theoretically save volume, weight AND money in one go.
If you're worried about weight, look at how much water you are packing. I realized I could upgrade packs to shed 12 oz, or switch to a Sawyer if I'm in water rich areas and save 4-5 lbs by not lugging around a 3L bladder.
If you're worried about weight, look at how much water you are packing. I realized I could upgrade packs to shed 12 oz, or switch to a Sawyer if I'm in water rich areas and save 4-5 lbs by not lugging around a 3L bladder.