I have about 10-15 cartos sitting on my coffee table. I filled all of 'em with different juices and can usually either tell from where I placed them, what the flavor is. If I'm not sure, sniffing always works. Wierd though, I just got some juices that I like alot and have been using only three of the cartos. I tried to smell the others today and nothing, so I put 'em on my PT and I got vapor but no taste. Does the smell and flavor just go away on all juices if the sit in a carto for a while?