Al Gore couldn't convince you to take your mug to the coffee shop? Then maybe those new jeans you can't afford will ... most coffee places offer discounts for bringing your cup along. And from experience, we know that asking (and paying) for a small drink usually gets your whole mug filled up. So invest in a 20 ouncer!
(And yes, you are sensing a theme ... Recession girl spends most of her disposable income on caffeine and cocktails).