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sippy cup

[sip-ee]
noun
  1. a spill-resistant drinking cup for toddlers, having a tight lid with a spout.
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Origin of sippy cup

First recorded in 1985–90; sip + -y1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for sippy cup

sippy cup

noun
  1. US and Canadian a plastic cup for young children which has a tight-fitting lid with a perforated spout
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012