Material - Bike Tubing
Bike tubing can be considered the cheapest material for Flow Arts can be used to make a lot of different props. It is easily gotten for free by asking local bike shops for their old bike tubes.
It can be easily used as weight in Contact Staffs, Dragon Staffs, Doubles, Poi, Rope Dart and fans. Because of this it is a great way to start with a new prop as you can try a prop without investing a lot of money. All you need to do is cut out the valve and its ready to go.
Not only can it be used as weight for your props, it can also be used to grip your staffs. While it isn't a great grip, it is free. Cut the valve out, cut the tube into a flat sheet and then wash with soap and water then your ready to wrap it on your staff.
You may need to clean the tubing before you use it, since it is recycled it is not always clean or great smelling.