This Dewar condenser is for use with dry ice and other solid cooling agents

It can also be adapted for use as a small constant temperature bath by using a constant boiling liquid. In this manner, it can also be used as an oil bath. The larger size will hold a 100 mL flask; the smaller size will hold a 10 mL flask. Has standard taper 14/20 outer joint at top and standard taper 14/20 inner joint at bottom. Fabricated from borosilicate glass.