A sand clock glass is a transparent container that is used to hold sand in an hourglass or sand timer. The glass is typically made of durable material such as glass or plastic and is shaped in an inverted cone or bulb shape. The sand is placed in the upper bulb or cone, and as it flows through a small opening into the lower bulb or cone, it measures a specific amount of time. The sand clock glass allows for easy visibility of the sand as it flows, making it a popular choice for timing activities or games.
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