go back and read Beermeister32‘s post again. When a brewery fills a growler for you to take it has already been carbonated in another vessel. Unless you will have a brite tank or fermenter capable of completely carbonating your beer, you will need to bottle condition.Bottle conditioning leaves a layer of sediment at the bottom of the bottle and you need to pour carefully to make sure it doesn't resuspend in the beer. Pouring multiple times from the bottle will guarantee that the sediment will resuspend, and being a larger bottle there will be more of it doing so. Also, are those bottles you chose pressure rated and if so to what level? Last thing you want is them bursting on you as the beer is carbonating and sending glass shards and beer everywhere. Again, this isn't something that is really an issue when you take home a growler from a brewery as the beer will not be gaining any more pressure, and is filled at standard air pressures. Your bottles also look to be far thinner glass than a standard beer bottle or growler and that extra handle section if hollow (which it appears to be) would be a very likely point of failure.