Is the cap one or two pieces?
The cap is one piece with a small silicone ring insert for a better
How do I clean these bottles?
Disassemble all parts. Clean them with soapy water, and rinse with tap water. Sterilize
Does a spectra nipple fit these bottles?
Yes it does.
Can I pump directly into these with the Spectra 2 but use Avent natural nipples and rings?
Yes. You can pump into them with Spectra S2 and use Avent Natural or
Can you attach these bottles to the Spectra S2 pump and pump directly into these bottles?
Yes. These bottles are compatible with Spectra S2 and Avent breastpumps.
How do I choose the flange sizes?
Measure the diameter of your nipples. Do not include the areola. Refer to size