Alterna Jars for Blendtec have sharp blades and the blade assembly cutting unit is removable from the container. This carafe with another interchangeable blade unit fits also on Vitamix, Waring 3.5 hp blenders, and many others. The material is made from Eastman Tritan Copolyester and is BPA-FREE. The Alterna lid fits on Blendtec jars and the Blendtec lid from the Wildside and Fourside Jars fits the Alterna Jars. Optional accessories are extra blade assemblies with different configurations, tamper accelerator tool (universal fit for any blender jar), and repair kit for Health Master Blenders, JTC blenders, and much more! We ship to anywhere in the world. Shipping in the USA is FREE. Visit our website for more information!