Silicone cup with lid and straw makes transitioning from bottles to cups easy! Toddlers can use the cup with or without the straw. The soft silicone straw helps support baby-led weaning, and drinking from an open cup supports healthy oral and speech development. The cup measures 2.7 x 2.7 x 3.3 in, with a volume of 5.2 fl. oz / 150 ml. It weights 4.42 oz/ 125 g.