Sometimes, you go out for a night on the town, have a few too many drinks, and wind up peeing on the back wall of the local McDonalds because they just wouldn’t unlock the damned door and let you to use the bathroom. In that scenario, peeing on the wall isn’t such a good thing. If the wall in question is inside of a bathroom, and actually changes color when you pee on it, then it’s totally OK to pee on that wall. The thermochromic urinal changes from shades of blue and green to vibrant yellows, oranges and reds when you pee on it. In other words, this is a wall you can pee on without other people looking down on you.

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