CoinSafe Square Coin Tubes are made of a high quality compact design that is strong and durable, and has a double locking seal cap for safe reliable storage. The tubes are made in a square design to be stack-able and prevent rolling. These tubes are also great for storing jewelry supplies, beads, hardware, buttons and other small items. CoinSafe Square Coin Tubes are PVC free, archival safe, and Made in the USA.