We recycle shopping plastic bags as rubbish bags. You know: this is where you put carrots' peels, oranges' rinds, coffee grains, etc., before throwing everything to the garbage can. Did you notice that plastic bags do not stand up by themselves? That's why I decided to build a bag holder. The first one was made with pipes, but after one year, my wife decided that it was not nice at all and that it fitted only one size of bags. So I built a new wooden one.
Step 1: Needs
I started with sawing 7 pieces of trunnions , 25 cm long:
2 large pieces (2.8 cm)
5 thin pieces (0.9 cm)