Yet, Sippy cups
keep the tongue forward in a primitive suckling position.
SInce the same muscles used for eating & drinking are used for speech, tots with speech/language delays or low oral motor tone should use open-mouth, soft plastic cups with a semi-circle cut out for the nose, to promote lip closure. A neurotypical 8-mo.-old can drink from such a cup if mom holds it; by 12 mos . he can hold it himself.