It was suggested that the pre-bottling sugar can be stirred into the mix instead of added to the individual bottles--and that's certainly true. But, to do it that way requires a second 6-gallon bucket and transferring the relatively clear product in the primary fermenter into the second bucket WITHOUT transferring the sediment from the bottom. Then, sugar can be stirred into the brew in the second bucket and the resulting mix can be bottled.
I've found that to be an extra step that adds an unnecessary potential for contaminating the brew. And, being clumsy, it also adds to the potential I have demonstrated for "spillage." Without the transfer process, stirring-in the sugar would also stir-up the sediment and each final bottle would have a larger amount of junk on the bottom. My current bottlings have very small amounts of sediment, so I lose very little when I pour a cold one.
If anyone is interested in making wort from scratch, I can shed some light on that process, too. It's not necessary to buy the Cooper's stuff and it is significantly less costly to make your own. Plus, you have greater control over the final taste of your beer/ale/porter/stout/whatever. But, it is a fair bit of work to make your own wort. And Cooper's, while a bit more costly, has the benefit of being quite consistent.