The many uses of other types of checkbook covers are placed into a trifold setting.
With its trifold closure, it's simple to slip into a pack or bag, but the wallet also expands to hold all your necessities for your trip.
You could also choose to use neutral-colored 8x11 inch cardstock and create a trifold invitation that you can seal with a sticker and address on the back.
Fossil's bold Color of Money trifold is ideal for slipping into a slim, dressy purse.