I bought a hand held metal tool box a couple years ago. It stays in the truck. I keep everything from duct tape to matches. From a baby food jar of fondant to a bottle of water. My tool box is just an extention of everything else I "may" need that day. I may find queen cells, may want to cage a queen, might get called out on a swarm call....so it's all in the truck. I even carry a extra set of clothes, extra sneakers, and toilet paper. I have extra bottles of water behind the seat, and a few granola bars. I take everything I might need while in a yard. And the tool box is a place where many things go. A small mag light to a sharpie. A marking pen to some hive staples. I may not be back at that yard for a month or two, so I take it all so I can leave knowing I dealt with whatever I needed too.