If you have a Sunoco near by you might want to pick up one of their "Go Cups", while they have them on sale for 99 cents! You will be able to use these cups up until December 31st for 49 cent refills when you use one and so your 99 cents will pay you back on the first fill!!
Get one now, before they're gone!
Disclaimer: I have nothing to do with Sunoco or this promotion, I just love a great deal! Thanks!