Luckily, the days of making ice packs at home with ice cubes and a zip-top ... clunky old ice cube-filled plastic bags. They’re also more durable, reusable and flexible, so they can mold to ...

Insulate! Arrange each clear plastic cup in a “nest” of insulation in the reusable plastic container. As a control, place one cup in a container with no insulation around it. Put one or two ice cubes ...