Actually I've cut back lately. The price of 'no-name' pop has invreased by 50% in the past couple of years (0,79$ to 1,19$). So I've cut back. Plus the aspartame is not great on muscle mass (it accelerates muscle wastage - a problem that is already inherant with my condition - not to mention getting older).
Those bottles are used as cloches to protect the tomato plants against frost, so I've been saving them for over a month.