Reddit reviews 5.5" DUAL COLOR LIQUID TIMER

Three-minute timer watches time with colored oil droplets making their way down a Z-shaped rampDual green and blue-colored oil creates an awesome visual effectGreat for those needing to find a unique desk toy or timer for workshops or classroom timed activitiesNote: Keep out of direct sunlight. Product works best at temperatures between 32-122 Degree Fahrenheit (or 0-50 degrees Celsius)