herefishy, You may be right about Frog's Fanny working a little better. In a lengthy discussion elsewhere, the consensus seemed to be that Frog's Fanny includes a small amount of desiccant. However, the bulk order hydrophoic fumed silica works very well for me. I even did my own unofficial home test with refloating and prepping flies with both and I couldn't tell the difference.

I second the turkey baster method for filling the bottles. My bulk powder came in a 1 qt. bottle and the turkey baster makes it easy to transfer the powder without making a mess.