@Kirsty Thankyou x
Welcome xx
With my little girl I saw a trick where if you put yogurt on the top they put it in there mouth as it’s got something on it and suck then realise something is in the cup this worked with mine it might work with your little one too xx
My 18 month old just knew how to use it and used it straight away keep giving the current with a straw and your daughter will eventually use it correctly and suck through the straw xx