This is a smart way to purchase your picks, with a nice little carrying case/keyring. With this set of guitar picks you will be sure to have the right size pick with you at all times, there is a set of 12 picks, two of each color and some with different sizes so you will have a nice little selection to choose from.
The case that these picks are stored in is leather and shaped like a triangle, opens and closes by a snap and holds all of the picks easily in it. A nice thing is you can use this case as a keyring so you will always be packing your favorite pick. The picks seem to be made nice and durable and have lasted so far.
https://www.amazon.com/Mugig-Plectrums-Leather-Contain-Thickness/dp/B01N1F5RMW