I’m so confused about what sort of cup my 12 month old should be using. He’s been using a basic tommee tippee sippy cup since 6 months but now I’ve read they can impede speech development so now I’m really worried we done some lasting damage :( In terms of what we should be using I’m confused about all the terminology… straw cup? Weighted straw cup? Free flow? Aargh! We have just tried an open cup a few times but it’s just not happening at the moment so we need an alternative. Help! Just tell me what to buy!!