Most often trebles are used with lures and are relatively small in size say #12 or #14 particularly where there are multiple sets of the trebles on the lure like you see in many crankbaits
I dont carp fish anymore but now use it for spoppers on the trent so its constantly chucking out up to 12 ounces now and still performs the same as the day i got it, cant ask for anymore than that
While I use it every time I travel, I also put it to work when I go to the grocery store, an office space for the day, and the gym all of which I do on foot or my bike in any sort of weather
It increases slowly over time, as well as with each spear strike
That said, these packs are rated to carry up over 50lbs for around $400 and will come in around 40 ounces for the pack itself, plus or minus depending on options
Or maybe in your car or something