My guess is it wouldn't work well for packing unless you want to hard-pack. Actually, I'd bet money on it.
I think it's just a small dildo, so not really suitable to packing (i.e. not at all flexible enough to be arranged like a packer would be able to be). I think, if you want an inexpensive packer (that you don't have to worry about bursting, like the hair gel in condoms route), you might as well go with the Soft Pack from Babeland. A lot of guys seem to like it, you can pack with it, and it's a $16-$22 range for all four sizes. Or you could get the GV Sailor Soft Pack for $24-$28 for their two sizes. I think it'd be a better investment than a 3" hard-on, given what I imagine you're looking for.