I have several Dr. Browns bottles from my daughter that I want to use for my son. However, I do not want to use all the venting parts. I do want to use the dr. Browns nipples though.
Anyone try using a different collar for the bottles without any leakage issues? When I try using the dr. Browns collar without the venting parts, it leaks. I've also tried using Medela collars and those leak as well

Thanks.