Can you put milk into Unbottle Bottles?

Yes, you can put milk into Unbottle Bottles. After use, clean thoroughly with hot soapy water, and for further cleaning, use bicarbonate soda and water. When not in use, store without the cap on to allow the inside to dry. Be cautious not to leave organic products in the bottle for too long, as it may cause pressure to build and potentially damage the bottle and lid.