This solid bottle lid is pale yellow. It screws on tightly to Medela breastmilk bottles and collection containers so that you can travel with or store breastmilk without fear of spilling. This is the type of solid bottle lid that is currently supplied with Medela breastmilk bottles and breastmilk bottle sets. However, it is compatible with all types of Medela breastmilk bottles. BPA-free. Microwave and dishwasher safe.