Casascius coins are physical metal coins, labeled with values of Bitcoin. The coins are metal, tamper-resistant and wrapped with a hologram. Founded by Bitcoin user Casascius; the idea was tangible representations of Bitcoin and each was worth an actual Bitcoin. Casascius coins are available in 1, 10, 25, 100, and 1000 BTC increments.
As of November 2013, Casascius Bitcoins were suspended for sale.