There is a small scale commercial cider maker not too far from me. They force carbonate some of their ciders using a machine that appeared to be a much larger and more sophisticated version of a corny keg. I assume that they leave the cider in there for a couple days prior to bottling, but I didnt ask them specifically. For home brewers, corny kegs work like a champ and are very cheap. You can use a CPBF to fill bottles, but I just use a length of racking cane that I stick in the tap and drop the pressure on the keg when I fill bottles. I also fill higher than normal so there is only a small amount of headspace in the bottle. That works great, and is cheap. When the keg gets low, its a little wasteful of CO2, because after dropping the pressure in the keg to fill bottles, you need to re-pressurize the keg again.