at a McD's drive thru here in town, a guy walked up, placed his order, grabbed the cashier through the window and strangled her. After that, no one served except inside a vehicle anywhere in town. I don't object, but I don't tend to eat that kind of food when I'm riding. How about a third option: Does your pharmacy deliver? Avoid the problem altogether. Although, if Costco's price is so much better, switch and put the money saved into your bike (you've got a list tucked away, I know it). Seems service isn't the big issue here.