I've found some coin pockets to be the right size and shape to securely carry a single ID or credit card or hotel room key in times where you don't need or want

I've found some coin pockets to be the right size and shape to securely carry a single ID or credit card or hotel room key in times where you don't need or want to carry a full wallet. I've seen coin pockets rebranded "golf pockets" for similar reason that golfers find them useful for scorecards and maybe a pencil.