I bought one of these bags from the amazingly helpful Lisa at Slickers, who recommended it. It is brilliant. You unzip it to fill it with training treats and can then quickly pull out a treat With thumb and forefinger, to reward good behaviour. No rummaging around in pockets or with drawstring bags. In fact I was so impressed with it, that I bought another one for my wife to use if she’s out separately with our other dog. Highly recommended and wonderful product knowledge and service from Slickers.