I buy a couple of pinky mice at a time fore my lizard how do i care fore them between feedings howwhatwhen?

since i give him a pinky only once a week .. what do i do with the others? right now i have them in a box with some bedding and on my tv cause its give out a bit of heat !... hey .. you work with what ya got ! do i feed them water how will the survive for a few weeks or do they just do ? anyways if someone know enouf about lizards and there food pls answer .. ! thanx in advance