Answer:
Condensation
Step-by-step explanation:
Condensation is the process in which a substance changes from it's gaseous state to it's liquid state.
The scenario described in the question is as a result of water vapour in the surrounding, coming in contact with the cold bottle. When this vapour (gas) comes in contact with the cold object (in this case cold bottle), the vapour will be converted to water (liquid) which is seen as droplets on the body of the bottle. This process is known as condensation.