When did you move to an open top cup?

[Summerdays2014]

Hi, my 14 month old has all his drinks from a tommee yippie free flow cup. No problems. I've just been reading a book on a peach development and it says move to an open cup asap. We tried this the other day and it just went everywhere (though my son thought it was great!)
At what age did you children manage an open top cup, and does a 'sippy cup' really make that much difference to their development?

Thanks

Op I agree, my little boy will say mama and dada, and shoes, but other than that he barely talks (but waffles all day).
My friend has a son who is a week younger who can pretty much name all the teletubbies, will say "mummy come here", "wow look a doggie" etc.
I just think it's really cute but am not worried about my sons speech. He was early walking (9 months) so I guess they have to be more advanced in some things than others. I really wouldn't worry

Op I agree, my little boy will say mama and dada, and shoes, but other than that he barely talks (but waffles all day).
My friend has a son who is a week younger who can pretty much name all the teletubbies, will say "mummy come here", "wow look a doggie" etc.
I just think it's really cute but am not worried about my sons speech. He was early walking (9 months) so I guess they have to be more advanced in some things than others. I really wouldn't worry

I thought the issue about lidded cups was avoided by using free flow spouts? I think the no-spill spouts make children bite and suck at the same time to drink - and this develops the wrong muscles (or possibly hinders development of the right muscles) for speech.

For what it's worth OP, my 4yo refused to use an open cup until we bout him special (character) ones for Christmas when he was 3.4 and then got it pretty quickly. He had over 200 words at 18 months. My 15mo is currently having a great time spilling water from his TT cup into his older brother's open cup and trying to drink from that. He doesn't say much yet but does a mean impression of a duck.

I really would try not to worry too much (easier said than done I know).

My 2.5yo still has morning and evening milk in a bog-standard Tommee Tippee sippy cup, largely to prevent spills around the house.

He's perfectly capable of drinking from an open cup and does at meal times. We tend to use a Munchkin 360 when out and about.

Like FATE I can't really see the issue unless they're swigging from it constantly through the day. DS guzzles his milk in a few minutes so what he drinks it out of seems pretty inconsequential.

bought him

Oh and the baby is in bed, not currently spilling water everywhere. But that's what he spends a large proportion of mealtimes doing.

I stressed about cups, when DS was smaller. I think cos I have a friend who's a speech therapist who is very against the hard spout sippy cups. He's 21 months now and will drink from basically any cup, including open cups as that's what they get at nursery. Open cups are just for meals though as he does knock them over sometimes. Don't know why I stressed so much about it. Pretty sure all kids figure it out at some point

We did straw cups mostly (on her advice), and also the 360 ones. we switched from bottles for milk around 12m-15m and the straw ones are a pain to clean so that was my incentive for the 360. Water only in difficult to clean cups!

DD got the hang of it by using one in the bath (ignore if your hygiene standards are higher than mine) and using a doidy though don't fill them too full.

Reliable age 2 I'd say.