Micro punctures Hold a lighter just beneath the hole (but not touching the reservoir). The heat will melt the material together in seconds.
Ruptured seams or small holes Clean the hole/tear with an alcohol prep pad from your first-aid kit, then smear a dab of Gear Aid’s Seam Grip ($7; 1 oz.; gear-aid.com) over the area. Wait 24 hours after applying the sealant before drinking from the bladder.
Larger holes Cut two circles of duct tape: one slightly larger than the hole, and the other ¾-inch bigger. Place the smaller patch sticky-side-up over the hole to minimize the water’s contact with the adhesive. Then cover it with the larger piece, sticky-side-down.
Full blowout Line the reservoir with a plastic bag or condom (carry a lube- and spermicide-free one in your medical kit), fill the bag, tie it off at the opening like a water balloon, and secure the reservoir cap. You won’t be able to sip through the hose, but you will be able to carry water.