Alas, Bayer Clinitest is no longer available. I purchased a stash of 200 tablets a few years ago that I continue to rely upon (On occasion, they show up on eBay at a premium price). As far as I know, an alternative for home winemakers is the Accuvin Residual Sugar Test....but I have no experience with that product. I would be interested in hearing about other alternatives that don't require a spectrophotometer or reagents with very limited shelf life.