Card holders help you avoid carrying those gift cards and memberships you rarely ... can encourage clutter as you add in random cards and multiple bills. For us, a leaner everyday carry is better ...

They're all electronic cards that multiple other credit, debit, loyalty or gift cards can be digitally loaded onto – so you end up carrying around just one card, instead of a wallet full of them.

And not just with the original retailer – the cards can actually hold multiple gift balances, associated with the various retailers where you have received gifts from friends. Explains Facebook ...