BoonNursh Reusable Replacement Pouch with Collapsible Silicone Pouch Design - Everyday Baby Essentials - Stage 2 Medium Flow Baby Bottles - Gray - 8 Oz

Do the 4 ounce liners fit in the 8 ounce shell?

Hi. I was wondering the the silicone pouches can be labelled? I have 3 kids and their pedia doesn't want their bottles mixed up. I color coded the plastic bottle cases but was wondering how i can label the silicone pouches?

if you buy the lids could you store frozen breastmilk in the pouch without the outside shell?

Is this pouch UV sterilize friendly?