I searched the archives and didn't see it discussed. Apologies if I didn't look hard enough...

I need a bullet proof coffee mug that will fit in my bike's bottle cage. I've used a few free ones I obtained from various companies, etc. but they are all crappy. I've decided I'm willing to pay. Does anyone have something they really like? Any suggestions?

I use the bus on my morning commute (to avoid being sweaty and ripe at school all day) and then I ride all the way home (weather permitting) in the afternoons. I only added the last statement so people wouldn't think I'm riding ten miles each way drinking coffee and bunny hopping over motorists.