Do a search in this subforum for "Gumby Hash" or just "Gumby". You'll only get three or four links and I think the one you are looking for is the first one. You'll find a link to another site that describes the Gumby hash method. It worked very well for me and costs almost nothing. It probably isn't as good as using bubble bags, but then again you don't have to spend $150-$200 for bubble bags.