For the dining plan, everything is “clumped” together linked to your confirmation. So, for a family of four for five nights, it will show 20 table service meals, 20 quick service meals and 20 snacks. How many you use and who uses them in your party has no limitations other than not going past that magic number of 20. So, yes, you can go to the snack bar and get 4 cookies, using your magicband. The receipt will then show 20 TS credits, 20 QS credits and 16 snacks remaining.