Have you drunk your glass of water in the morning already? Drinking a glass of water like the one in our Pink Glass of Water Sticker in the morning has several benefits for your health and well-being. After sleeping for several hours, your body is dehydrated. Drinking a glass of water in the morning can help rehydrate your body and kickstart your metabolism. Drinking water in the morning also can help flush out toxins from your body, which can help improve your digestive system and prevent constipation.