Our 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.