I tied a loop of bungee through the plastic weightbelt buckle that I use to hold my can light on. When I needed to switch to a "rec" setup for classes I would put the buckle on without the can and put the mouthpiece through the loop. If doing night dive "rec" style for classes the buckle was enough out of the way of the can to still secure the octo to as well. If I was diving my normal config I would simply tuck the loop up between the buckle and webbing so it was out of the way.