FACE OFF / kitchen/household/living

In many times we use our bare hand to feel the cold and hot in many things especially water. and because of that many accident such as scald burn occurs.thats where my idea comes in, no more touching, no more putting our hand in danger. Solution

brainstorming:

when it comes to how to do it, I came up with a idea that the sink plug which is a consumable can uses pigment that have temperature senses. In other words, when water touches the sink plug it can instantly show a color whether cold or hot, letting the user know it is safe or not.