I carry several mods/units with me most of the time. Rarely do I carry spare loose charged batteries, so either in the units I have on hand with me, or the rare occasion I'm carrying spare batteries they are in a 2 or 4 bay plastic battery case like mentioned above. I wear cargo pants at work most of the time, carry a small, single battery mod with a tank in the left upper/outer pocket slot, battery case if necessary in the inner left pocket, my Sourin Drop (pod mod) in my pocket I keep my loose paper bills in (emergency mod for a quick nic fix as it is nic salts). After that, I carry a spare single battery mod /w charged battery, a two mods that are DTL (Currently a Dual 20700 battery Squonker, and a dual 18650 mod with a Sub-Ohm RTA), rest of my units are MTL devices, back pack also I carry spare juice and rebuilding supplies. Another option is to carry around a small, even a waist pouch dedicated to solely your vape gear, small enough to carry in one hand with your purse, sepperate pockets in the pouch/case to sepperate mod, batteries, accessories, and spare juice. They also make small dedicated vaping cases to carry mods and supplies.