The Capsule is designed around the YubiKey 5C NFC and holds up to three standard-size keys at once. The included foam inserts are designed to keep a single YubiKey 5C NFC snug. Smaller keys will fit, but won't sit as tightly.

If you're unsure about your specific model, check the dimensions on the product page.

A rubber O-ring seals the lid, which keeps out rain, spills, and humidity — the everyday moisture that corrodes contacts over time. It handles everyday carry without trouble.

Shipping is free on all orders. Once your order ships you'll receive tracking by email. Delivery times vary by destination.

Find out more in our shipping policy.

Yes. Our return policy covers what's eligible and how to start a return.

You'll pay less per Capsule when you order more than one.

Order two and save 10%; order three or more and save 15% — applied automatically at checkout, with no code to enter.

Mixed colours count toward the total, so a set in different colours saves exactly the same as a set in one.