Pour the milk into a large cup. Stir the vinegar into the milk and allow it to sit for a few minutes.
Pour the mixture onto a paper towel or coffee filter once solids, or curds, have begun to form. Hold the towel or filter over a cup or the sink to drain out the liquid. Let them sit there for five minutes to completely drain out.
Transfer the curds to a dry paper towel and press another dry paper towel on top. You want to get out all the whey, or liquid, you can.
Put the curds into a cup or bowl and add the water and baking soda to it. Stir the mixture together.
Use a paintbrush or your fingers to apply the glue to paper or other items.