Pretty good.Great to reduce plastic but taste not so good or fizz.
We like to rotate our bottles, cooling the water first before carbonated. These work well. Would have given 5 stars had the shape been a little better. For me, they are a little too long and narrow which makes fitting them to the sodastream at little more fiddly than the standard shaped bottle.
Superb thank you
Excellent and you do need a few to vary contents.
I hadnt used my Sodastream in years!! Seen a link to the Website and decided to buy a couple of 1L bottles & a couple of 0.5L bottles. Its been great to be able to make fizzy water that tastes right. Bottles keep the fizz for ages and it tastes as good as it did the day I made it. TOTALLY Fabulous!!!!! Love the bottles and am thinking of getting a couple of the glass carafes. However if I don't these are still perfect for what most folks will need.