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Apr 11, 2019 Make collection bottles from empty (16-ounce, 473 ml) dry and damage free water bottles. Drill a 1/4 hole  and a 1/16 vent hole  in the cap of the water bottles. You will insert the spindle oil tube  through the 1/4 hole in the bottle caps  Note: The tube must fit tightly. The diameter of the vent hole must be 1/16 .