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This emoji is a test tube, often used to represent science, experimentation, or laboratory work. Read more
It is not particularly popular, and is most commonly used by adults and teenagers. It is most commonly used on Twitter, Instagram, and Facebook. This emoji is not rude in any way.
The test tube emoji was introduced in 2015 as part of Unicode 8.0, and was added to Emoji 1.0 in 2015. It is primarily used to represent scientific experimentation, laboratory work, and chemistry in general. It is also used to represent a variety of other topics, such as medicine, technology, and progress. It can also be used to express feelings of curiosity and excitement, especially when combined with other emojis.