I bought a Cory vacuum coffee pot today. The pot does not have a filter rod. I will buy one on ebay but I need to know if there are different sizes or are they all the same? Also I need to know if there is supposed to be a gasket of any type between the two glass halves of the pot. The mating surface is ground glass and seems to seal fine. I tried it out on the stove and the water did rise into the top half. When I pulled it off the heat it returned very slowly to the bottom. When you make coffee do you pull the pot off the heat right away when the water is all in the top half. It fills up pretty slow and returns pretty slow so I would think you should pull it off right away. I really do need to know if there is supposed to be a gasket between the two halves. Any other information would be very helpful. the pot is marked CORY DCU