Weight the ingredients on a measuring scale and pour it all in the plastic container.
For the first month, release the build-up gasses once or twice a day.
Then, for the following months, open the container cap once in a while to release gasses as required or every other day.
Wait for 3 months and it will be ready to use. (1.5 months, if you have added yeast)
Strain the mixture and store in a reused plastic bottle.
For the leftover pulp, you can either use it for the next batch as a starter for fast fermentation. Or you can grind it, store it and use it as a tough stain and grout remover.