ThermoWARE (PLEASE SCROLL TO THE RIGHT) - Influenced by 'hot water bottles' and 'ice packs' that are used for medical purposes, this is a low technology solution that uses hot or cold water (freely available from the kitchen faucet) as the thermal element. Product manufactured using 'slip cast' ceramic - can be microwaved & refrigerated. When tested for heat retention, the product stayed warm for more than 40 minutes.