Borosilicate glass burettes have white 0.1ml graduations and are mounted to a polyethylene screw cap and bottle. Squeezing the flexible bottle forces liquid into burette. Overfill drains back into bottle when pressure is released. The drain arm has a 2mm bore glass stopcock. Large, stable plastic base can be detached from reservoir. Accuracy of burette is within 1% of total volume. Graduation accuracy is class A.