thermochromic inks for lid tabs

thermochromic tabs make it easy to spot the chilled cans in crowded refrigerator or an ice cooler. the tab turns blue, red or green when chilled. source httpwww.ctiinks.commediactithermotab5292014.pdf for video or colour changing tabs, refer this link httpswww.youtube.comwatchvsvx0z6hvwpo