Nah the factory in the West Bank was closed about nine years ago. So you'll be happy to know Palestinians in the West Bank have a longer commute and have to pass through a lot of security checks if they want to work for Sodastream.
So you can buy a Sodastream with a clean conscious. Unless even employing Palestinians is somehow wrong. Which people will find a way to rationalize because everyone knows that people who have a decent job are less likely to fire rockets at Israel, and we want that to continue forever, right?