| 摘要 |
Manual exercise device that is comprised of a combination mouthpiece and top cap, a soft-rubber check-valve, a hard plastic hollow spherical bulb, and a soft plastic washer with a minuscule hole at its center held in position by an open-faced cap. A preferred embodiment affords a user a means through which to manually create and maintain a slowly depleting vacuum within the hard plastic bulb, exercising flaccid tissue and musculature in the process.
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