hmm i think u get abit confuse here..
a. u can put the right potion for ur hamster in the bowl to feed her for 12 hours. after that u will need to clean it up.
b. regarding not good to put out for a few hours, i guess its about the whole container. it is not advise to put the whole container out till it melt or half melt, EVERYDAY. it will lost its nutrition if we do it for a month, daily.
of cos if u want to be real good, u can just put the right potion for ur hammi, which she will finished in 1 - 2 hours. then u top up again when she finished. n repeat like this whole day long

it is just easy like our instand noodles. anything u feel to eat, give cook, so anytime u feel to feed, just feed

but like working ppl like me. i only can feed them b4 i go to work, and after i back from work. so the smoothie will be there about 12 hours. that is also good enough

Thank you nezu for your clarification.
Hun, don't la so tension.