Life
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sippy cup (Life S02E21)English 2009. 4. 13. 01:33
http://en.wikipedia.org/wiki/Sippy_cup The sippy cup is a spill-proof drinking cup designed for toddlers. It works by way of surface tension that prevents liquid from being spilled even when the cup is upended. The critical element is the sippy top being firmly in place on top of the cup, preventing spills. The sippy cup was invented by Richard Belanger, who licensed the design to Playtex.[1]