The average household uses 1.1kg of aluminium foil every year and, even when its made from recycled metal, it still uses a lot of energy to produce and transport.

So instead of using a new piece to wrap your sandwiches in every day, re-use it for a few days. It is not a real hygiene risk and even messy food can be washed off it easily.

But better still use a paper bag or a reusable lunch box to keep your BLT in.