a spill-resistant drinking cup for toddlers, having a tight lid with a spout.
Origin of sippy cup
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian a plastic cup for young children which has a tight-fitting lid with a perforated spout
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