Bottle "Good Until" Safety Tag for Breastmilk and/or Formula

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4852102.

Why I created this: I got up with our 4 month old daughter in the middle of the night and was pretty sure the (nearly full) bottle of breastmilk that got left out wasn't good anymore. Not wanting to wake up my wife who had been sick, I heated up a different bottle. Found out in the morning that she had left it out on purpose, expecting baby to wake up, and it would've been good. It wasn't by the morning so had to be dumped. Not wanting to re-experience the resulting scene that ensued, I came up with this design.