DESCRIPTION: In routine domestic life, it is a common observation that there is practically no gap between the mouth or rim of the bottle and the stem of the funnel. This causes slow intake of the liquid poured because of the entrapped air inside the bottle. This also leads to overflowing of the liquids. This age old problem could be overcome by providing few grooves or a ridge along the periphery of the cone length so that air is pushed out. This feature can easily be incorporated in the moulds.
SOURCE: Shri N.V. Chandrasekharan, Electrical Engineer, Development Consultant (P) Limited, 40 Mount Road, Madras - 600 006, Tamil Nadu.