Kitchen gadgets review: the self

The GuardianKitchen gadgets review: the self-heating butter knife – what a time to be alive!The GuardianThis gadget isn't self-heating in the way you're thinking, like a towel rail or a pocket warmer. There's no exothermic reaction, or nano-mechanism hidden in the shaft. Its secret is thermal conduction, transmitting heat from your hand to the blade. Put ...