FIZZIT™ Stainless Steel Carbonation Bottle and Water Bottle | Compatible With Philips Carbonation Soda Maker, Smeg and Aarke Soda Makers, Dishwasher Safe

Seems sturdy, it's a good size, and the threads fit an old sodastream I was given (I think it's a Genesis).

Extra water storage for Summer

With the warm weather I needed to get a spare bottle. A friend of mine said my sparkling water was better than the stuff from the store, so I got one for her too I don’t feel bad about leaving the water in the bottle in the fridge for a while since the stainless steel and keeps it tasting fresh

Some room for improvement

Although I'm happy to have an alternative to plastic, there's room for improvement. It would be nice if future bottles could be insulated and have a wider opening to make cleaning easier.