I only used:
an old tuna can (the medium sized round ones, about 400grams or 14oz)
a stick (for the handle. Mine was about 2 meters long or 80 inches and was thin bamboo so, it's light and strong)
a long nail,
a clear plastic bag
Step 1: The Assembly
2nd step - put the bag
3rd step - mount in the handle
To modify the can you must:
first make a cut in the side like in the photo,
then remove the bottom (don't remove the metal ring around like I did, just cut the bottom)
make a hole in the opposisite side of the side cut the size of the nail.
To the bag I just put it in the can and glued with tape.
Now pass the nail throw the hole and open a hole in the tape and the bag.
Grab the handle, put the can's nail on it and glue with tape.