The Nalgene poly bottle to the left includes three types of tape that may suddenly come in handy. The poly bottle measures 3 1/2 inches (9 cm) in diameter so the circumference is about 11 inches (28 cm). If you wind a piece of tape around the bottle three and a half times, you'll have about a yard (meter) of the stuff. More than you may ever need, but you'll never notice the added bulk or weight. And if you store it this way, it'll be easy to find.

The tape to the right is duct tape. Besides being useful for all sorts of impromptu repairs, it can be used as tinder to help start fires (a popular subject on YouTube). 

The tape to the left is cloth first aid tape. This is what you use when you want first aid tape that really sticks (be sure to use strips that are long enough). It can also be used as a substitute for moleskin when boots are rubbing, and as all-around repair tape. It burns as well as duct tape, so another source of tinder.

The tape in the middle is Nexcare first aid tape. It doesn't stick as well as cloth tape, but for minor injuries that can be good thing: the tape is more easily removed once it's time to replace or stop using the bandage.