Being able to keep log of bags without charging them up front

I use thermal bags and ice pads to deliver. Our delivery is FREE and we try and stay away from EXTRA CHARGES! it really kills business relatiionships. I had to disable the feature of charging bag deposit up front cause it was killing sales from happening. It will be nice to have that feature sligthly tweaked where we have that trigger ready to shot IF WE DONT get the bag back for example. After people had already purchased and been warned of the dynamic. Then if they dont return the bag for any reason they will be charged and not upset. Currently doing this manually.