Borosilicate glass Erlenmeyer Flasks are also known as a conical flasks or E-flasks. The conical shape allows the contents to be swirled or stirred while the narrow neck keeps the contents from spilling. Both KIMAX® and PYREX® Erlenmeyer flasks are offered. We offer glass Erlenmeyer flasks with glass joints, rubber stoppers, glass stoppers, screw caps, or no closure. Our Erlenmeyer flasks styles included heavy duty, filtering, UV protectant low actinic, narrow mouth, and wide mouth flasks. Many sizes offered, ranging from 10ml to 6 liters.