See drawing for list of materials. Smooth wall plastic water bottles have a wall thin enough to cut with a sharp blade or Xacto [R] blade. Wood hub can be any scrap lumber about 1x1x1 size..Cup hook eyelets are used here .5/8 size is easy to use for mounting and insertion into the hub.Predrilling of a hole will aid screw in assembly.
Crimps can be found in small packages in any Art and Craft store.
Wood screws shown are available from any dollar store or your junk pile.
String- fish cord of 10 lb. strength is very thin and strong. Otherwise use plastic or stretch-Polymer cord of 1 millimeter size found in Craft stores everywhere. Packing string can be used but you will not get the long term use from it.