And as a smoker - I saw Jamie Oliver use a biscuit tin as one.I've had good experiences when using metal sweet/biscuit tins (Full metal bread bins are excellent for longer term/group use). If you'd like to experiment then try using the tin upside down and without the lid - it's a lot easier to check on the pie(s) progress!
The same metal tin can be used for a bushcrafters Sunday roast too