Is it possible to carbonate in a igloo instead of bottles to avoid sediment?
Unless you will always have sediment, no matter what you carbonate in.
An igloo cooler is not a pressure vessel, so you can’t carbonate in that anyway. You can avoid sediment by carbonating in a keg and then racking the beer from that keg to another leaving most of the sediment behind. Or bottle from that keg.
As Robert said, no. You can’t pressurize in an Igloo so co2 will not stay in solution. Using corny keg as a “bright” it you best option to avoid yeast sediment from carbonation. But then if you have a corny keg you would also likely have co2 and then you can just force carbonate without sediment.
Denny must be drunk. 