... flat bottom, round bottom, long neck and short neck. and all the type. Flask is one of our borosilicate glass ware include flat bottom, round bottom ... , long neck and short neck. and all the type of the Flask used in the LAB. Our ... the production of borosilicate glass (Pyrex).Our products include Beaker, Flask, Desiccator, Test tube, many type glass tube, Bottle, ...