Welcome to the Do-It forums pa.jay!
You need to be careful in storing this raw plastic in just any old plastic container as it can attack and soften several different plastics. Its been my experience that hard plastics, such as a juice pitcher, might be suspect. Think in terms of quart or pint milk/half and half containers. I'd be doing a month-long test on any container prior to filling one up. As for filling with less mess, try pouring a couple three quarts from your bucket into an ice cream bucket that's been well washed, the funnel into the smaller containers from there.
Again, welcome aboard!