Adding a lemon slice to a glass of water instantly infuses it with a sweet, acidic punch. This helps prevent dehydration, as you might be more likely to drink it.
Lemon water also gives you the added benefits that come with consuming citrus fruits, such as antioxidants and vitamin C. The citric acid also might help with digestion.
Cucumber water also has subtle added flavors, and cucumbers are loaded with antioxidants, vitamins C and K, and potassium, which can lower blood pressure and promote bone health.