United States
Blendtec
Utah-built blenders with blunt cold-forged blades instead of sharp ones. Square jars, no tamper supplied, and a home line that borrows from the commercial one.
Blendtec engineers around the jar rather than the blade. A blunt edge in a squat five-sided container moves a batch differently than a sharp edge in a round one, which is why nothing in the line ships with a tamper.