I make my beads ahead of time in 1 gal containers. I use the clear PET and I tested several before I found one that I was happy with. My suggestions to you are these: 1) Congratulations!! I hope it goes well for you. 2) Limit your scents. The more scents you have, the more you have to make up. If you limit the choices to say 6 or 8, then I think you can have a better handle on the final outcome. 3) Make them ahead of time. They will hold without problems. Store them in a dark place if you are afraid of fading. I have some in an original test container that has been there 3 years and still no diminished scent. 4) Have all your hanging accessories (ribbon, string, etc) pre-cut and ready to go. 5) Depending on the length of the fundraiser, have a turn in day about mid-way through to give you an idea of where you are standing. 6) Start thinking now about how you are going to get holes in them for hanging. When I made them regularly, that was the most time consuming part of the whole process. I am thinking of starting them again but won't commit until I have a better "holeing" process. Good luck and let us know how it goes for you!!