Leak-proof cap for Pulsar and Pulsar Therm drinking bottles. The Sigg Pulsar Top cap is the perfect replacement cap for Pulsar bike bottles. Thanks to the integrated SureSnap valve solution, it prevents leaking even when the cap is open and simplifies dosing. The cap remains sealed at all times and can be easily opened and closed with the mouth. The bike bottle is not suitable for carbonated beverages. The screw cap contains no harmful substances, including phthalates or estrogen-active substances.