To completely seal the Blendtec when in use, it is recommended that the Sound Shroud is removed and lid is held down. This allows the Blender to be used in high traffic settings. The lid of the Blendtec ICB3 is designed to allow air escape during high speed blending and does not seal completely. Please note: signs of use & wear on the outside of the unit, like the jar or the base, is to be expected. These units have been rigorously tested to ensure that they function as intended. This product is made in the USA and 1 year warranty is provided through VMInnovations.