Asda seems not to be following sodastream rules for recycling as they don't give refund on empty cylinders they only swap empty for new and add surcharges on doing thisYou also must have a receipt for the cylinders you are returning also difficult to find asda stores that have cylinders in stock

I have found it very hard to get excited about either a gas bottle for barbeque or a gas bottle for a soda stream but here goes- The gas cylinder sits unobtrusively inside it's den and only bursts into life when gassing a new bottle. It handles the gassing of the bottle with a fair degree of aplomb and remains very silent about its achievements, not boasting about its success.

My daughters bought me the Sodastream system for Christmas and I've used it every day instead of buying fizzy water in plastic water bottles from the supermarket. This has replaced 400 bottles so far and saved me lots of money too. My only issue, and hence the 4 stars instead of 5 for my rating, is that there is no provision for recycling the canisters I order from John Lewis every 4-6 weeks.