I know that they're tiny fridges, but do they hold a carton of milk? My daughter is drinking whole milk now and it would be much cheaper and easier to get it at our grocery stop and keep it in the fridge if it will fit. Otherwise I guess we'll just get one each day. We'd probably get one of the tall, skinny cartons (I think quart, but I'm so bad with liquid measures!), since when we're in the parks we'd probably just buy a tiny carton if she wants it at a meal, but generally she drinks water. So we'd just use the milk in the morning and before bed, so just the small carton would be fine. Will this fit in the fridge?