Owlet Smart Sock 3 Baby Monitor with Oxygen & Heart Rate. … My baby has more air in his belly and spits up way more often with these “anti-colic” bottles. Plus, the white plastic insert turned a gross yellow after I washed them. Read more. 10 people found this helpful.
https://www.amazon.com/Tommee-Tippee-Advanced-Newborn-Feeding/dp/B078H9H19W