Use the bottle with or without the liquid still inside.
Keep an eye on the illuminated signs and/or listen for cues from the flight attendants or captain.
Make sure you have clearance to lower your tray table (during take off and landing you will need to have it locked in place).
Gently push bottle as far back as possible, into the seat in front of you. When the person in front of you tries to recline, the seat won’t go back.
