Traditional method, I just pour hot water into a bowl and soak it for 5 mins. Then test if it’s too hot, will run bottle under the tap to cool down. As for bottle warmer, I’m using the one from TT and takes only 5 mins, just need to pop the bottle in and set it to the right setting. Would recommend you to get one. Carousell has many selling second hand at affordable prices.
If using traditional method, just put warm water + add a little hot water dip in awhile then take out and feel, can put 1-2mins then feel if it’s not ok, then put it in again. I’m not sure about Phillips as I use TT warmer so it normally takes 3-5 mins to heat up.
I use traditional method, I feel it's faster , around 5 to 8 mins and the milk bottle is warmed up