A CLEVER APPROACH IS WHAT GOES INTO OUR BOTTLES. LIKE OUR NEW ACTIVE TECHNOLOGY. State-of-the-art engineering with a pressure-relief valve and pre-ventilation system. The new top is also leak proof – even if you turn the bottle on its head – which is great for all athletes, drivers and kids. With this top, having to unscrew your bottle is a thing of the past, so you can simply reach for your beverage whenever you get thirsty – without taking your eyes off the road and without the risk of spilling. Stay perfectly hydrated with the new SIGG Active Top collection. The Active Top aluminum water bottle has a highly resistant BPA- and phthalate-free liner, making it almost unbreakable!