Reddit reviews Sodastream, Carbonator Water Crystal

We love the Sodastream Crystal we've had for just over two years. The glass bottles are great & dishwasher safe, my only complaint is the caps hurt my hand when they're put on too tightly. Don't worry about all the comments about diabetes & telling you to drink tap water — we use it almost exclusively to carbonate tap water and drink it sparkling, with a splash of fruit juice. Here in Germany the norm is for people to constantly buy cases and cases of sparkling water, this is a much cheaper (and more environmentally-friendly!) alternative.

Edited to add: look for a set/deal that includes multiple bottles — we use 3 in constant rotation.