This is one of several sizes of measuring beakers offered by Oils4life.
 
Our measuring beakers are manufactured from borosilicate and are suitable for use with all essential oils and base products.
 
The measuring beakers conform to ISO 3819 and can be heated up to temperatures of 500 degrees centigrade.
 
The 50ml glass measuring beaker is a marked up with 10ml increments up to 50ml.
 
About borosilicate glass: 
Borosiliciate glass has more extensive chemical resistance and remarkable merits than that of all other known materials.
It is highly resistant to water, acids, salt solutions, organic substances and also halogens such as chlorine and bromine.
It also has good resistance to alkaline solutions.
At higher temperatures only hydrofluoric acid, concentrated phosphoric acid and strong alkaline solutions can cause appreciable surface removal of the glass.