High5 waterbottle it is important to stay hydrated at all times as even a small percentage drop in fluid levels can have dramatic effects upon your running performance leaving you feel tired and lifeless it is best to replace fluid both during and as quickly as possible after exercise so no matter where you are always have a water bottle to hand filled with your favourite sports drink these bottles are very cheap made of plastic with a re sealable cap often able to hold 500ml or 1 litre o