I guess what I really want to know is what is the smallest container I can go with? I am ok with doing the new batch of CO2 once weekly. If I EI I am going to be giving the tank weekly attention anyhow, may as well just add that to the routine.
OK, how much space is in your stand? As swylie said you can use a 20 oz or 12 ounce bottle. You just need to do the math and reduce the other things proportionally. The amount of airspace about the DIY is pretty much to help keep the yeast goo out of your tank.Not lazy. Perhaps you misunderstood the point of the question swylie. I want the container in the stand. Not sitting out in sight. Therefore the containers you mentioned, as well as most other off the shelf containers will not work. However, thanks for the input.