I was always able to get it for DD on the dining plan. I'd assume it's available for adults as well as kids. Are you wondering about TS or CS? I never got it for myself, but at TS restaurants it came in a decent sized cup with a lid for DD. I'm pretty sure at least once we got a refill on it. At CS restaurants, it comes in a bottle or carton. We didn't get free refills, but the bottles were big enough that there was always some left at the end of the meal.