The SpreadTHAT butter knife is made from heat conducting technology that utilizes your body heat to carve and spread cold butter. Engineered with a titanium coating that is non-toxic and food-contact safe, this makes a nifty little holiday gift for a very reasonable $19. Check them out here or buy it here.
Heated Butter Spreader by THAT! » FAQ — Kickstarter
Heated SpreadTHAT Butter Knife Powers Using Your Body Warmth
THAT Inventions Spread That Serrated Warming Butter Knife and Spreader, Red: Butter Knives
Though you may think it at first, the Spread That! Butter knife isn't electric. Instead, it uses a smart design and high-tech materials that quickly
Spread That! Butter Knife
Spread That! Butter Knife — KitchenKapers
SpreadTHAT! - THAT! Premium Kitchenware
SpreadThat Butter Knife Lets You Spread Straight from the Fridge, No Electricity Required - TechEBlog
SpreadTHAT! Butter knife that melts butter!
That! Inventions Hand Warming Butter Knife