If you have novelty silicone trays designed to create specialty shapes, however, deformation will be more of a concern. A semicircle mold, for instance, which is designed to produce round ice ...

One of the most frustrating parts about making ice in clunky molds can be clearing space in an already-stuffed freezer and finding gadgets that lock and stack securely to avoid unwanted spills.

For the last five winters, Waterloo resident Robert Aitkin has created a city of ice structures he calls Iceopolis by freezing water in a variety of household shape molds. (Karis Mapp/CBC ...