Test Tube
A glass or plastic cylindrical laboratory vessel used in schools and science experiments for holding and mixing liquids.
Estimated value as of 2026 · Source: School Specialty, Walmart, Nasco Education, Carolina Biological Supply - average…
Fun Fact
Pyrex test tubes are made from borosilicate glass, which can withstand temperatures up to 500°C, making them ideal for heating liquids in experiments.
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