Simple to open with one hand click the button. The flip cover is designed with a safety lock to prevent dust and leakage and prevent accidental opening allowing you to enjoy spill-proof at work or during sports & fitness. This motivational water bottles can hold 1 liter of water, large wide mouth can help you drink water quickly. the mouth is wide enough to fit ice cubes and fruit, also easy to clean. lightweight, equipped with a portable wrist strap, easy to carry around. very suitable for home, office, gym and outdoor sports.