Trek makes an insulated commuter cup that is almost spill proof (I have to shake mine upside down to get it to leak). It is made specifically for a standard bottle cage and doesn't rattle. It comes standard with their SOHO commuter bike, but I got the local Trek dealer to order it from Trek. It was about $12-$14 if I remember correclty (although I think I got a deal, as I was quoted one price and charged another and the receipt print out with the number listed it as smaller cup than what it was in actuallity). I have had it for about 1.5 years (got the wife one also). It is definitely not as nice as the Nissan but still a nice cup.