MAUJOY Liquid Level Indicator with Loud Audible Alarm
MAUJOY Liquid Level Indicator (MAUJOY) — ~$17 (seen Oct 2026)
Clip it on the rim of your mug and pour: it beeps and vibrates faster as the liquid rises, so you stop before the scald — no more dipping a finger into hot coffee to judge the level. The two-stage alert even lets you pour coffee to the first beep and leave room for cream. Honest caveat: it's a small gadget with small probes to keep track of, and we confirmed the Amazon listing is live but Amazon blocks our page reader, so have a sighted check of its reviews before buying.
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