Disposable pie dishes.

Many food containers get reused here. Aluminium or plastic. Seed trays, bird food saucers, drip catchers for pots. Old spread boxes hold apple pulp and blackberry coulis in the freezer. Some mushroom trays fit my 4 cell seed trays just right for the windowsill. Yoghurt pots get cut up for labels (especially for those giveaways), 4 pint milk bottles have been known to be cut down into scoops or mini cloches. Funnily enough I've never reused a pie plate for another pie