I have used Maxpedition as a wallet for the last year. It’s nice. It’s a little on the large size but I don’t like bifolds and keep a lot of small bills so it fits perfectly for that task.

small bills = so you don’t ever have to wait for change and can always pay almost exact amounts.

theoretically, I would like to find something a little smaller while retaining the same idea – not a folding wallet, can hold up to 100 banknotes.