Airtight glass jars (Mason Jars) are good for storage and curing. If the tin is close to air tight, it should work fine. Remember to dry it first. It will probable sweat in an air tight container so you will need to open it for an hour or two every day until it stops sweating. A slow dry will make the potency great. If the buds are pretty wet, watch for mold. For long storage, I use air tight Mason Jars and keep it dark and cool...