Not everyone wants a full drink before heading out for a run — especially early mornings, or when you're already tight on time.
The usual options are a coffee (which takes time to make and drink), a gel (which is mostly for during a run, not before), or nothing at all. None of those solve for "I want a small amount of caffeine, right now, with nothing to prepare and nothing to carry."
Gum solves that gap reasonably well — no kettle, no cup, no waiting around for it to cool down. Chew it on your way out the door.
Each piece of Neuchu has 50mg of natural caffeine, and it comes in a pack small enough to keep in a running belt or pocket. You can find it here.