Yes, you can use your Philips Avent Premium 2-in-1 Warmer & Sterilizer to warm a new bottle immediately.
However, the warming time will be longer. The appliance will detect that the starting temperature of the water is higher and slow down the warming process to avoid overheating the milk.
If you need to warm milk quickly, refill the appliance with fresh, room-temperature water.
If the amount of milk in the new bottle is different from the previous one, make sure to use the correct amount of water for warming your milk or formula. Use the window on the front of the appliance to check (image 1).
For small volumes where the milk in the bottle is less than the height of the base (image 2), the water level should be the same as the milk level. For large volumes (210 ml/7 oz or higher) where the milk in the bottle is above the height of the base (image 3), fill up to 1 cm/0.4 in below the rim of the warmer.
Do not allow the water level to go above the neck of the bottle or let the base overflow.

