Just like the gimmick of restaurants in their bottomless drinks, fastfoods have their Go Large option where you add 20% to 30% of the cost of the regular and your drink will be large size. This is a good come on for customers particularly with the younger generations who can finish a gallon of drink maybe. But for ordinary mortals like me, it’s waste of money to “go large” since the regular size is sufficient for my small stomach. I did a check of the trash bin of one fastfood store and I saw the leftover drinks of the large cup. It’s really a waste of money and resources.