Air-Tite Container
Another option that is very fast and easy is using Air-Tite containers.
They are under $1.00 (USD) and bypass the need for exterior tape or mod podge.
Adds to the cost, but makes up for it in saved time.
You can choose from many sizes.
Make sure you purchase the correct size for your prints.
Place one side on the bottom. Then you can add a poker chip or wooden nickel, and place the other side on top.
It may help to use a dab of glue or double sided tape to keep it from sliding.
Once all the pieces are inside; it is ready to be put together.
Snap the pieces together and everything is all nice and snug, ready to travel.
No tape lines, no time spent on mod podge, ready to go!