[jrowen]

Even more hipster: A nicely machined piece of walnut and bespoke pre-rounded cards:

https://ugmonk.com/collections/analog

I love it! There's a disc-bound version for on-the-go as well.

[MonkeyClub]

Love how the French clips ("discbound") version is "only" $29.

I get them at my local stationery shop for €0.80, but theirs don't have brass discs.