If you're interested in a SodaStream machine, I found one on sale on Amazon for as low as $56.99 (usually $99.99 and up).
You can also get a SodaStream machine bundle for $89.59, which includes two CO2 cylinders, three carbonating bottles, and two Bubly drop flavors.
Check out more Prime Day deals and see how you can get the most out of Amazon Prime Day.