Discover the new sustainable version of the iconic SIGG Screw Top! The top keeps your bottle leak-proof and can be used for all Traveller drinking bottles in 0.6 L and 1.0 L or for the WMB bottles with the WMB adapter. The new BPA-free Traveller MyPlanet cap is based on renewable materials such as cellulose, which give the bottle a pleasant woody scent.