CNN: According to the old rule of thumb, you're supposed to drink eight glasses of water per day (and some experts recommend even more). That can seem like a daunting task on some days, but here's the catch: You don't have to drink all that water. Roughly 20% of our daily H2O intake comes from solid foods, especially fruits and vegetables.It's still important to drink plenty of water — especially in the summertime — but you can also quench your thirst with these 15 hugely hydrating foods, all of which are at least 90% water by weight. ANN.Az