Timing is most of training, and you cannot reward fast if you are digging in a coat pocket. A pouch on your hip puts the food where your hand already is.
Water-resistant fabric with a drawstring top that pulls shut so treats do not spill when you bend or run. Detachable adjustable belt, so you can wear it on a waistband or clip it to a bag. Grey, red or black.
Using it well
Wear it on your non-leash side so the hand that reaches for food is not the hand managing the line. Load it before you leave the house, not when the dog is already excited at the door. Keep the drawstring loose during a session so you are not fighting it, and pull it shut when you move between locations.
Soft, high-value food works better than dry biscuit for anything difficult, so expect the inside to need a wipe. That is normal and it is why this one is lined rather than raw canvas.
Part of the Leash Pulling Kit and the Recall Kit.