The Blender functions differently than others - somewhere between a regular banger and a slurper, but also neither. With powerful centrifugal action, the walls become a primary work zone. The whole spectrum of accessories comes into play here- spheres add heated mass and lower the work zone. The core function of a channel cap lends itself perfectly to the task, albeit a bit more specialized to account for the variation in use.
This style is available in 45 degree angle as well as 90 degree. (Please make sure you order the correct size for your application)
The 2mm thick walls will help soak up the heat and release it slowly helping to keep the banger in the hot zone longer.