I have just opened up a box of tommee tippee closer to nature bottles and a box of Avent ones and none of them have plastic disks that stop milk getting to the teat until you want to use the bottle. Now, my oldest DC are 17 yrs old dts and DD3 is 11, and I'm pretty certain bottles I used for them had these pesky disc things. I am currently 38+5 weeks pregnant. Am I suffering from pregnancy brain? Did these discs exist? Do they still? Do I need them to help keep milk sterile/ prevent leakage?
Please help