3 Added picture
source | link

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

enter image description hereFizz-Keeper Pump Cap

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

enter image description here

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

Fizz-Keeper Pump Cap

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.

2 added picture
source | link

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

enter image description here

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

enter image description here

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.

1
source | link

You can get a little pump that attaches to the top of the bottle.

https://www.amazon.co.uk/Jokari-Fizz-Keeper-Pump-2-Litre-Bottles/dp/B00004XSH3

It pumps in air to pressurize the bottle, thus preventing the carbon that makes the drink fizzy from escaping the liquid.