My baby is transitioning from bottles to cups. He doesn’t want the bottle anymore and LOVES a straw cup. It’s the only type of sippy cup he will drink from. The problem is he has always been gassy and he is swallowing a lot of air with the straw cups and then throwing up from all the gas in his belly. Previously we used the Dr Browns vented bottles which stopped the gas and colic puking he had before from non-vented bottles. But now he’s older and still has this issue but does not want the vented bottle anymore. I can’t seem to find a sippy cup with a straw that is vented and I’m concerned if I don’t find one soon then he will get dehydrated bc it’s hard to get any liquid in him. Any recommendations I could try?

FYI he loves this squishy silicone beginner straw cup from Lalo. But that’s also what he’s swallowing all the air with. I appreciate any recommendations!!