The key is the following: 1/2 inch Schedule 40 PVC couplings from Home Depot. I got them in a 10 pack for easy counting. They were less that $2 per bag. The holder above cost me less than $8 in parts. It's not the lightest of materials - the rack weights just over 1.5 pounds.
Stickles Storage - How about a clever way to store your Stickles? Cookie sheet hung under a shelf using ribbon run through the holes of the cookie sheet handles to attach it to the shelf. Magnets glued to the bottom of your Stickles bottles and then attach to the cookie sheet.