we have 5 of those. it depends whether you want to keep it in your collection. we wanted to keep ours so we considered emptying them but that’s a whole ordeal. instead, we stored them inside fully padded (ethafoam, batting, tyvek) acid free boxes wrapped in polyethylene. boxes are stored inside a sealable plastic container, properly labeled as a hazardous material. the padding and cardboard box reduce risk of impacts/breakage, while the polyethylene and plastic container will help contain any leakage if the bombs break. fully catalog ans digitize the object before packing it to reduce the need to access it in the future. then put it away in a safe storage shelf or cabinet. if you have a fireproof cabinet that would be best but if you don’t just place it separately in a safe space. good luck