The only thing I don't like about Higginson's is the powder comes in boxes. I seem to remember a discussion from quite a while back about appropriate containers, but I'm asking again. Obviously keeping the commercial powder containers is a good idea, but I've run out, so now I'm looking for an alternative. Is all HDPE #2 the same, in terms of composition? If so, then 2.9L laundry detergent bottles seem like a good idea. The pouring spout will come out w/ a bit of a pull, leaving a nice wide mouth jug. Obviously a thorough rinse is in order, but is there any reason not to use these jugs? I've also got quite a few #2 plastic containers, but they're clear, and I'm wondering about light breaking the powder down. Is that a concern?