I’ve been using this as my milk came in due to one nipple being extremely sore and cracked to the point I couldn’t have baby on there without crying. As baby feeds on the other, this allowed me to easily catch the milk from the sore one and store it to 1. Save waste 2. Keep milk supply up without needing to pump which can cause over supply in the early days. It didn’t aggravate the pain and allowed me to combi feed my express milk via bottle whilst giving my nipple time to heal before baby could go back on.
Now my milk is fully in, I use it as a catcher but also as a manual pump, so it does seem to have multiple uses and doesn’t cause me pain or discomfort.
I also like that it’s easy to clean (with a bottle brush) and sterilise in the microwave, highly recommend as a starter catcher for breastfeeding.