HSBXL · Club-Mate · Helmholtz

Mate-o-Meter

How much Club-Mate is left? Blow across the bottle neck like a flute and the pitch tells you.

No reading yet

Press Start, then blow across the bottle.

Microphone

No browser handy? Dial 2685 (BOTL) on Eventphone's EPVPN, hold the phone next to the bottle and blow across its neck. Same physics, same formula.

Calibrated for the 0.5 L bottle. Inspired by Eventphone's Mate-O-Meter on 6283 at 27C3, formula from tuxcodejohn's mateometer. Source, EUPL-1.2.