Some small case to put each in when in my jacket pockets. I'm sure there are many available.
Want a good one but not pay through the nose....
Am in UK so want to buy from UK site.
A Google search brought up the UK website below and more that have a variety of them. Amazon UK also has some.
vapecasesuk.com - says they have Free S/H this month
Maybe you'll find a couple that are suitable at the above.
ETA: I removed 2 other website links, as they considered silicone sleeves...to be cases.