SIGG Pulsar SPORT 0.75L - WhitePOLYPROPYLENE No leaks something you can rely on with the Pulsar. The SureSnap valve solution integrated in the mouthpiece guarantees this even when the lid is open. Use is equally straightforward. The bottle is easy to open and close with just your mouth. Thanks to the shape of the 0. 75 litre bottle, the Pulsar is a perfect fit for the hand, while slight pressure on the soft bottle is enough to ensure perfect flow of the drink. This means its great