Hydration Pak Question

I currently own a Camelbak Chaos with a 70 oz bladder. I am wondering if hydration packs can fit larger reservoirs than they come with, or I am stuck buying a whole new pack.

I’m not familiar with your specific pack, often the packs are designed around a specific bladder size but there may be enough room to stuff a bigger bladder in there, but maybe not completely full. If the pack has extra compartments besides the one for the bladder you might be able to put a second bladder in there. I have a pack from MEC that has a bladder compartment and a main compartment if I’m going for a really long ride I can put an extra bladder in there, there are even routing holes for the tube through each shoulder strap so I can just grab one or the other.