Sippy cups: Threat or menace? Cory Doctorow 5:29 am Wed, Feb 13, 2002 Uh-oh. The godsent, spill-proof “sippy-cup” is being linked to speech defects (toddlers sucking the cup’s straw rather than graduating to real cups leads to lazy tongues) and cavities (constant sugary liquid intake). LinkDiscuss (via Blather)