I just ask them straight out. Why guess?
It's a little of both. Believe it or not, my the balls have a lot to do with the size of the package in question. Sometimes the area gets filled up for that reason alone. For no reason at all, it seems my the balls get smaller or larger whenever they want. They just seem to "fill up" with whatever. Ummm. I like them when they're 'full'. (thanks)
How the hell did I get in here?