You want to blend thick and heavy creamy concoctions. Without the need to buy an expensive Blendtec Twister Jar, you can equip your Wildside or your Fourside jar with the Alterna Lid and Tamper system and accomplish the same thing.   You don't have to stand by and  keep twisting the Twister-Jar Lid twisting tool until you might find yourself with carpel tunnel inflammation. And your big Blendtec jar (Wildside / Fourside and VOID VACUUM jar) is much bigger too, while also saving over $100 bucks.   Made from food-grade rubber in the USA, the lid fits on Blendtec jars and on the Alterna Jar.    Use the tamper only with the Alterna lid in place to prevent the tamper from touching the blades, while at the same time gently pushing down on ingredients and accelerating the blending process. MADE in USA.

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PICTURE depicting Blendtec Fourside Jar, jar is not included)