Probably only one but who's going to do that...lol
I have one can with 4 x 6s 8000 mah that baby will go up like a roman candle

I think all you can do is keep them in a storage charge at home, keep them out of the house and shop if you can. (mine have been in my shop for years)
Check them from time to time for balance if there sitting for a few months.

My ammo cans are vented, lined with dynamat insulation foam to give the packs a soft ride and less chance of a short on the can
placed in lipo fire bags, I put them in a corner where there is a cement lip in my garage should contain the fire but the smoke damage will be a mess

next step is mini fridge in shed