WANTED: Dog treat pouch

We have just started off as boarders for a lovely guide dog who is completing her final stage of training. Part of our role is to reinforce good behaviour (like stopping at kerbs) with food. We have seen some people with pouches to easily access the food and wondered if anyone has one they no longer need and could donate it to us? Means she will get her treat a bit faster as we tend to faff with pockets. Thanks!