We love this cup! Working in early childhood special education, many co-workers, speech therapists especially, have recommended using a straw as early as three to four months, ad it helps to promote mature mouth development. It helps develop oral motor skills for neater eating and more articulated speech. The "squeeze" feature on the cup allows mom to help the little one adjust to sucking from the straw. It's smaller size holds the perfect amount of liquid and is just right for little hands!