Calma has been designed to be used with Medela's bottles and containers. We have not done testing on other manufacturer's containers. You may find that you can thread Calma onto other bottles but you may find that this combination may leak or cause other issues. We do not recommend using Calma with any other manufacturer containers.
This Question Applies to:
Calma® Breastmilk Feeding Set with 5 oz Bottle
Calma® - Breastmilk Feeding Nipple