My fiance got me a Soda Stream last year for my birthday and we LOVE it! We use filtered water and go through 2-3 bottles a day. It's super easy to make and you have a lot of control over how much fizz. The soda flavors are wayyyy too sweet for us but we don't drink soda anyway and use it for seltzer.
We just switched our cat to World's Best from Tidy Cats and I love it! No more chemical smell - only all natural corn. It's easier to scoop and stays in the litter box more than any other litter we've tried. Kitty likes it!