I store them both in my Avery Elle storage pocket in my Halloween/Fall bin and when I need to select a stamp I can Pull it our and see which one will work.
To purchase Papertrey Ink products click here https://www.papertreyink.com/
Some basic supplies I use I purchase from Hobby Lobby or Micheal’s with coupons or on sale
Hobby Lobby brand is called The Paper Studio
their website is http://www.hobbylobby.com/home.cfm
Micheal’s brand is called Recollections
their website is http://www.michaels.com/