I have most of Delia's baking tins and liners which I love. I am now considering purchasing the Little Gem sauce pan and frying pan, but am somewhat deterred by the fact that they are aluminium and food will come into direct contact with it. I was wondering if they have been treated in some way, making them different to the aluminium pans we were told to discard in the past. I would love to get these pans so hope you can offer me some reassurance! Thank you in anticipation. Judith..