The Mix n Stor Keyring/chain has measurements marked and the blue cover is removable.

The solid blue Wonderlier Bowl keychain has a removable seal (lid).

The Jel Ring mold has a removable inner design seal and also a removable bottom seal/lid.

The blue and red Shape-O ball keychain has one yellow shape inside it

The pink and white Thatsa Bowl button cover should fit over a fairly flat 1/2" diameter button.

Check the photos and ask any questions.

Thanks for shopping at my store.