Change of bottles

Has anyone changed their bottles and noticed a difference in reflux symptoms? Currently using tommee tippee. He was on carobel but is now off it as was severely constipated and Gaviscon doesn’t do much! Other medication risks outweigh benefits and because he’s putting on weight and the main symptom is the constant spit up in large volumes, I’ve been told to ride it out and he will grow out of it so I’m clutching at straws and hoping someone experienced a change of bottles.