My hiking kit is a standard mil-surp IFAK. The plastic insert box type. Contains the standard three sizes of bandaids in sealed packets, an eye kit, a CPR card, one triangle muslin bandage/sling, two compressed dressings (pressure dressings), one compressed gauze roll, two pill bottles (one has a small bottle of betadyne, the other has a 50 bottle of water purify tabs) and one stick of Chapstik with sunblock. On a longer trip or if I plan to have a friend or two along, I'll pack another IFAK with two more compresses, extra gauze pads, a roll of tape etc. There's not really much that's going to happen that you won't be able to handle with that. I'm a survivalist in most senses of the word, but I'm also a realist. A rifle round to the thorax, I ain't walking out, plain and simple. I don't really plan for combat, I simply won't be in it. My meds kit, my dailies, vitamins, asprins, Tylenol, anti-runs, salves etc all fit into a single 40dram pill bottle. You can pack a couple of dozen asprins etc into a tiny ziplock baggy. All your meds fit the one pill bottle and it's waterproof. If you have a larger group or you need a house kit, make a separate meds kit with full sized bottles. You can buy all sorts of sizes of empty firstaid kit boxes off of ebay cheaply. You can buy empty bottles the same way. I buy gallon sized Betadyne etc and fill 4oz bottles for smaller kits (car, camper, squad kit) and printable labels, again, ebay, are cheap. A platoon sized kit (common 20 person $25 kit size) I pack in the larger green mil-surp boxes. A dozen 5x9 combi/abpads, rolls of gauze, gauze pads, rolls of tape, a SAM splint in each, tongue depressors, eye pads, hundreds of bandaids, ACE bandages etc. Individual small bottles of asprin and tylenol, tools and scalpel kits, suture kits etc are packed into ziplocks. My largest kits are M17's. Those are full field aid station kits. I've only ever pulled those out twice to serve as first aid officer for events (foot races and hikes), and I always took them to SCA events. Used lots of bandaids and lots of gauze and tape but never had to use a 12 x 30" trauma dressing, I'm glad to say, but I have a half dozen if needed! Never had to perform emergency surgery, but I have the tools and the knowhow if necessary. My resupply box, isn't really a kit itself but it has maybe forty pounds of all the basics stashed in a blue sealed tub in the basement.