Cotton swabs (American English) or cotton buds (British English) consist of one or two small wad(s) of cotton wrapped around one or both end(s) of a short rod made of wood, rolled paper or plastic. They are commonly used in a variety of applications including first aid, cosmetics application, cleaning, and arts and crafts.

The tool was invented in the 1920s by Polish-American Leo Gerstenzang after he watched his wife attach wads of cotton to toothpicks. His product, named "Baby Gays", went on to become the most widely sold brand name: Q-tips, meaning "quality tips". The term "Q-tips" is often used as a generalized trademark for cotton swabs in the US and Canada. The Q-tips brand is owned by Unilever and had over $200 million in US sales in 2017. Although doctors have said for years that it is not safe to use cotton swabs for ear cleaning, it remains the most common use.

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