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I've lived on these cups during both surgeries - keeps cold drinks cold and warm drinks warm. I use to hands to use cups so these have been great during recovery. 

I bought mine at Target but here is a similar one at Kmart: http://m.kmart.com/despicable-me-minions-jar-tumbler/p-011W008297799001P?sid=KDx01192011x000001&pla&kpid=011W008297799001&kispla=011W008297799001P 

Comparable price to the one I bought.   And the mason jar size means it holds a lot. Being a kids cup you do not have to worry about dropping it and having it break.