i have a couple of homemade pouches on the front of my hip belt…one is "envelope’ style (about that size, with a flap that folds over and attaches with velcro…it is non-breathable silnylon)…i sewed 2 “open-and-close” velcro loops on the back of the pouch which wrap around my hip belt in case i ever wanted to take it off (i’ve never needed to take it off, so i think i could have made it with a more “permanent” attachment)…i can put hat and gloves in there, or “lunch”…it will also hold a 15.2 oz. “minute maid” juice bottle sideways (i love the little bit of wide mouth on those bottles, as well as the lingering fruit flavor! :>) i need to tweak the design a bit, however, as really small items (like chapstick) can slide out under the flap…i suppose you could “glue” together (instead of “sew”) a little pouch such as this, as i believe there is some type of glue that will accomplish this (can someone make a recommendation?)…my OTHER pouch is one that paw-ee made and is used almost exclusively to carry another juice bottle…this is a very simple, regular nylon, drawstring sack…flat, it is about 9 x 4 1/2 inches and has a cord and cordlock at the top that runs through a simple 1/2 inch casing…i merely attached this little bag to the other side of my hip belt by sewing with a few strong stitches (button thread) through the belt and into the top of the bag casing! (this bag hangs down lengthwise, but not too far to restrict movement)…so easy!..you know why i love this little bag so much?..it makes my water bottle so EASILY accessible!..the drawstring opens easily, i remove the bottle (even while walking), and then just drop it back in!..i really don’t even need the cordlock, because gravity working with the weight of the bottle automatically closes the top!..you could probably find remnants at the fabric store on sale, or cheap nylon articles of clothing at a second hand shop to use for materials…you might want to fashion “mockups” for patterns from ANY old simple, “non-slippery” material (be aware that nylon CAN "sqirm’ around a bit when sewing on a machine…patience!..practice!)…hope this information helps…it really does make it nice i think to have a few necessities conveniently available while you hike!
maw-ee