Oh my gosh, these candies are soooo cute! And they're really tiny so they'll be perfect for any size shaker card. I liked them so much that I just bought another container! By the way, these containers are super secure, no worries about the lids popping open. You can either glue a small magnet to the back or a piece of Velcro and stick them to a metal surface or fabric surface (which is what I'll be doing). That way you won't forget you have them and you'll use them!