You can use common household items to shape the tortillas into bowls — any oven - safe cups or bowls, empty metal food cans, mason glass jars or even tin foil! (melaniecooks.com)
In addition, metal food cans tend to look virtually identical on supermarket shelves.» (entrepreneur.com)
It is also used in the epoxy resins that line metal food cans, and as an ingredient in dental sealants. (newscientist.com)