Shower pipe cover (for color change PLA)

Does it take a while for hot water to get to your shower? Now you can see it happen!

https://gfycat.com/boldfriendlycivet

I'm trying to invent more practical uses for thermochromic PLA (changes color with temperature). This is a cover for a shower head pipe. The transition temp is listed as 31C / 88F, so it's perfect for this application. As soon as the color change starts, you know the warm water has arrived and it's time to get in.

I modeled this to fit my shower exactly. It simply s