The Nike Men’s Big Mouth Sports Fitness Water Bottle features a wide opening for easy refilling. It also lets you add sports drink mixes and ice to the bottle. Easy-grip screwcap with a large surface makes tightening and removal easier. The tapered bottom of the bottle easily slips in and out of bike bottle cages. The total capacity of this bottle is 650ml., Wide opening for convenient filling., Easy-grip screwcap., Tapered bottom to fit into bike bottle cages.