I certainly think it's a great idea, and would work really well if once you did the initial master batch, then break it down into individual one-batch sized containers. I have seen others do this and it seems to work very well for them. You would need additional containers with lids, of course, but if you plan to make 10 batches of soap in the next week or two (or even a month or so), it would be so much easier to measure it all out at once, melt it all and place into the smaller containers. Labeling your containers should be easy to do with a little masking tape and a marking pen. You could even melt in that container and do your mixing in that container. Less clean up with each soaping session perhaps.