High quality: These plastic transfer heart droppers are made from high quality sterile and non-toxic plastic. The 100% new material is soft and pliable, help to save your time when measuring and transferring liquids. How to Use: If you want to measuring or transferring fluids, you can hold the disposable pipette and push the top of the pipette to absorb the liquid as intended, then slowly loosen the top, let the liquid drip off to container. Use friendly for first-time users.