Double Walled Bottle, Wide Mouth GLS 80 with Screw Cap, Borosilicate Glass *) Simple, low cost, jacketed chemostat or bioreactor for cell culture. *) Vessel for temp-controlled reactions such as enzyme digestions. *) Simple continuous flow stirred reactor system with the optional GLS 80® cap components. *) Wide usable temperature range of – 40 to +120 °C.