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The Mystery of the Clicking Glass Tube: Identifying Those Vintage “Clicker” Toys and the Soothing Nostalgia They Bring

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ensuring a perfect blend.

Why these theories usually don’t fit:
While these scientific uses are real, lab agitators are rarely completely, permanently sealed with a flame-polished glass tip, nor do they typically contain exactly three balls designed to make a specific sound. If the tube you are holding is a standalone item, has no opening, no cap, and continue reading …

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