Small Size Sand Timer - Multicolor

The device consists of two glass bulbs connected by a narrow neck, which allows a substance like sand to flow from the top bulb to the bottom one due to gravity. 

The specific duration of time an hourglass measures is determined by factors such as the quantity and coarseness of the sand and the width of the neck. 

This particular item features three separate timers, each with a different colored sand (green, blue, and yellow). 

Sand timers are often used for tasks like cooking, games, or as a decorative item for a home or office.