HELP! Babe don’t wanna drink from other straw cup

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He likes his EZPZ 2oz training straw cup more than anything else. I’m trying to get him to hold it by himself and drink when he can but no luck. I used GrosMimi and the Munchin straw cup but he throw them away and play with them instead. He also just love to drink water when he eats but not after that or not between formula. Is this normal? Or do you have other brand recommendations? Or what should I do? He is 10 months old. First time mom here.