The invention relates to a method of making tethered pair liquid feeder/toy sets for infant use. Spherical shaped containers with segmental spherical seal rings are connected by a tether line long enough to space feeding nipples of containers about same as that of average mother's breasts. Interchangeable nipple substitutes are used are used to convert liquid containers to play ball sets and toys. Invention also shows how conventional elongated liquid containers can be converted to tethered pair containers by attachment of tether line to conventional seal rings, and by use of free tether line assemblage with thin flat washer-like rings that can be placed under seal rings. A wide variety of toy items can be placed inside containers and on tops of closure caps for containers, with toy items having visual, audible, and mechanically actuated features.
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