I have already covered waterproof Kindles and ways you can protect your iPad from water and liquids in the past. The new Pocketbook Aqua is another e-reader you can pick up to read at the beach or next to a pool. It has a 1GHz processor and 256MB of RAM. The device features a 6-inch E Ink Pearl display and 4 GB of internal memory. You get Dropbox and ReadRate support. The e-reader has a calculator, browser, dictionary, chess app, photo album, and more.
The Pocketbook Aqua is good looking and lightweight. Its battery can last you a month. This may not be a tablet, but as a sand-proof / water-resistant e-reader, it enables you to read your e-books anywhere. You can order yours here.