Ensure your puck is not fully charged. Preferably, do this when your puck is discharged and your smart bottle ask you for recharge

Unscrew Bluetooth Sensor Puck from your bottle (obviously)

Remove three Philips 1 screws and place them somewhere where you will not accidentally loose.

You will have to put a bit of a force to remove those screws, rotate your screwdriver counterclockwise. When done, all screws will fall out of a puck, when you rotate it upside down and give a bit of shake.

You might want to use your thumb when shaking those screws out of your puck to avoid premature separation of its lid in process