| http://www.w3.org/ns/prov#value | - While silicon is a suitable material when made in the dimensions suggested, other materials and other dimensions may be used so long as the diaphragm responds to the pressure differential across it applied by a toddler sucking on the spout so as to separate from the diaphragm seat 64 in the valve, as described in more detail below and shown in FIG. 3. [0022] The cylindrical wall 60 of the outlet s
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