A coffee grounds keeper! It keeps coffee grounds from spilling on your benchtop.

This is just a simple little thing I made for a mate.

He had been annoyed that coffee grounds would spill over the edge of the portafilter basket (yes, that's what it's called, though most people probably call it "a filter handle and that thingy you put the coffee into"), and make a mess.

He was very happy with it and uses it all the time now, so I figured it was worth sharing, despite its simplicity.

The photos should make it pretty obvious how it's used, if it's not apparent from appearances. Basically you...

• stick the grounds keeper on the portafilter basket,
• fill it up as usual to where the "conical" profile ends, which should give you the right level
• remove the grounds keeper
• tamp down the grounds and get on with making your morning brew!

I'd recommend printing in a dark material as the coffee grounds will gradually stain the plastic, even with regular washing. Personally I'd suggest black as it looks pretty classy, and won't show the "browning" as much.

Print Settings

Printer Brand:

Anet

Printer:

Rafts:

Doesn't Matter

Supports:

Resolution:

0.1mm

Infill:

Filament: 3DFillies PLA Black Post-Printing

Not much to do really - It probably wasn't really necessary, but I did lightly sand with a fine grained sand paper around the top and bottom rims after printing, and also on the inner surface.

How I Designed This

Originally designed using Blender off some measurements of a selection of portafilter coffee baskets.

There were a couple of iterations to get it to fit "snugly", but loosely enough that it could cope with minor variations in the outer diameter of the buckets.

I believe that portafilter baskets are a standard size, especially since the tamper tools are designed to fit very snugly into them to "compress" the grounds before making the coffee.

I originally had it twice as tall, but that actually blocked the view of the grounds going in, so it was hard to tell when you'd put enough (or too much) in the basket.

The knurling pattern on the outside outer has no functional purpose - it's just to look pretty really, though I suppose it adds grip...? It also hides minor imperfections in the print as well that would otherwise be quite visible in a completely "flat" surface.

Category: Kitchen & Dining