Permits Dribble-free Drinking Without The Need To Sit Up Or Raise The Head * Placing A Finger Over The Vent Hole In The Cap Controls The Flow Of Liquid Through The Mouthpiece * The Design Reduces The Amount Of Spilled Liquid Should A Mishap Occur * The Opening In The Mouthpiece Is Large Enough For A Straw * Graduated At 4 6 And 8 Oz Levels * Dishwasher And Autoclave Safe *