Test tubes
Test tubes
Test tubes are widely used in the lab to heat, hold and mix small amounts of liquid or solid chemicals. Test tubes can come in various sizes, however, they mostly remain a long and narrow shape of glassware. A common type of glass used is borosilicate glass, which is a type of glass made using silica and boron oxide, making the glass resistant to thermal shocks. You can choose between thin or thick-walled glass, and test tubes with a beaded rim or flat rim. Some test tubes also come with a lip for easy poring, a ground joint stopper, and graduation marks on the outside for easy identification during measuring.