I hardly used mine, my girl doesnt drink warm bottles unless its before bed or the water is in the flask when we go out.

All depends on how your baby is

My daughter liked warm milk where my son will drink it cold

Every child is different

You don’t really need to buy a warmer

Use a saucepan or bowl fill it up with hot water from the kettle put the bottle in for a few mins max of 3/4

Then give baby it