This rubbish doesn’t belong on this site, it is better than that. Totally impractical design, waste of a good micrometer, mug walls are far too thick to drink from, and they are sharp, aluminium would get too hot and burn your lips, it would also sink the heat away from the drink and cool it too fast, and the micrometer barrel would get in the way when drinking. Reckon it’s a fake photo too as there appears to be nowhere for the bottom end to clamp onto, it’s just hiding around the back out of sight, not clamped anywhere.