Moccamaster Cup-One Shower Screen

Shower screen for the Technivorm Moccamaster Cup-One 1-cup coffee maker. It distributes the hot water for even wetting.
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updated August 9, 2024

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This is a shower screen for the Technivorm Moccamaster Cup-One 1-cup coffee maker.  It distributes the hot water for even wetting of the coffee in the filter.  Simply place it on the top of the filter holder before brewing (it takes a little fiddling to position it under the water spout, but it's easy with a little practice…).

The Cup-One has a single hot water spout that drops all water into the center of the filter; Technivorm claim this causes dynamic mixing of the water and ground coffee, but in my experience that doesn't happen, and it simply leads to non-uniform wetting and extraction, and not very good coffee.  This water distribution disk ensures even wetting, leaving flat coffee bed, without the need for any stirring of the grounds or shaking the cone.

This model must be printed with a high-temperature filament to withstand the near-boiling water that being dropped on it.  I recommend using ABS; I have been using an ABS version of this device for many months and it is maintaining its shape.  I have tried PETG, but the hot water softens and it will sag after a short time, reducing the distribution effectiveness.

Print with enough perimeters and top/bottom layers so that the parts come out as 100% filled - i.e., solid plastic.

Supports are needed under the “arms” of the support ring, but they are quite small and don't add much printing time.

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