Baby Brezza Funnels. The product requires cleaning the funnel every four refills to prevent bacteria. I've brought you the solution: replacement funnels. Instead of disassembling, washing, and drying it, the process has become easier. Remove the old one and install the new one. Especially when the baby wants milk late at night, the mother's task becomes harder in terms of getting up from sleep, then washing the funnel, then drying it, then installing it. It's just replacement: remove and install.