We also love Kleen Kanteen and Sigg cups (Sigg's dont hurt so much lol, especially if you buy the neoprene case for them LOL). Also, the funtainers thermos straw cups are great but those hurt too (and aren't leak proof so if you turn it upside down, yeah, wet.. we have had 1 kids carseat soaked 4 times because of that.. hes not a fast learner LOL.. or maybe he is lol)