Fun to see our Bitcoin Keychain "Blockchain" used by The Guardian, the first time for them.
https://www.theguardian.com/technology/2018/jan/30/blockchain-buzzword-hype-open-source-ledger-bitcoin

If you want to own your own, here's a list of retailers:

ALL THINGS DECENTRAL - SHIPS FROM U.S.
https://allthingsdecentral.com/collections/featured/products/bitcoin-keychain

AMAZON - SHIPS FROM U.S.
http://amzn.to/2DY0a7f

PHYSIBIT - SHIPS FROM U.K.
https://physicalbitcoins.co.uk/?product=bitcoin-keyring

BTC TRINKETS - SHIPS FROM FINLAND
http://btctrinkets.com/presta2/index.php?id_product=23&controller=product