In this video you'll learn how to modify your sodastream for cheaper operation.
Affiliate included:

Parts used:
Adapter:
https://amzn.to/3klsW3L

Paintball Tank:
https://amzn.to/3gDd9er

Large 5LB Tank:
https://amzn.to/30CiOMi

Filling setup valves:
https://amzn.to/30zgOV2

SodaStream + Bottle + tank:
https://amzn.to/2DnIJyG