Unit Cells and Layer Sequences using Dimpled Packaging

Regularly dimpled trays such as those used in food packaging can be used to represent layers of atoms in solid structures. For example, the square array of dimples in transparent plastic mini quiche trays can be used to depict layers within cubic or tetragonal unit cells. Multiple solid structures and ways to represent those structures are described. 

Canned Heat

Liquid ethanol is poured into a saturated calcium acetate solution and a solid gel is formed. The gel burns like canned heat (Sterno™).