[Wormius]

I thought they were going to leave the containers there and take the chemical as required and fill up again when needed.

For that much methylamine, the contamination from the dirt wouldn't amount to much, and just fall to the bottom as sediment anyway.

It does show that Walt is not the perfectionist he once was. Also just thinking that both Walt and Jesse have almost the same skill-sets now, so either would be able to get along without the other.