I do have a TS100 which I use either with a battery pack or a wall charger. For storing it, I am using a metal casing that is used for a single cigar. There's a

I do have a TS100 which I use either with a battery pack or a wall charger. For storing it, I am using a metal casing that is used for a single cigar. There's also room for a tiny metal cleaning brush which protects the tip during storage. Given that all of this is metal and that the soldering iron doesn't have that much thermal capacity, I can pack it up while the tip is still hot and the casing will only get mildly warm, but not to the point where it'd cause damage.