Applications can include science experiment, modeling, making watercolors, and more. The outer wall of the straw is engraved with a scale, which can be absorbed in an appropriate amount. Easy To Use – Soft, pliable and easy to use, these pipettes could save your time when mixing your paints, oils,fragrances, etc with no cross contamination. 10 translucent clear Plastic Pipettes, can hold 3ml liquid, convenient and easy to use. Made of high quality food grade plastic, non-toxic & harmless, you can buy it with confidence. See picture for measurements. *Please consider the actual sizes given in the listing as the pictures are generally enlarged to show detail.