Awkward Dave Pays For His Silence

Last year, when the Wawa checkout guy asked me how big my coffee thermos was, I said "20 ounces, I think" and since then I've always paid the twenty ounce price for my refill, but the other day-- when I forgot my plastic coffee thermos in my classroom-- I bought a sixteen ounce coffee in a disposable cup and when I returned to school I poured the sixteen ounces of coffee into my plastic mug, so that it would stay warm longer, and I found out-- to my chagrin-- that my plastic coffee cup only holds 16 ounces: the paper cup to plastic mug transfer filled my plastic mug to the brim (it's obviously larger because it's insulated, so I am an idiot) but I am too embarrassed to tell the folks at Wawa that my cup only holds sixteen ounces, and so they are still ringing me up for twenty ounces . . . but I did catch a break on Friday, because there was a new checkout girl, and when she asked me what size my mug was, I told her "sixteen ounces" and so I guess I'll just have to wait until the entire staff turns over before I consistently pay the proper price for my mug.