Prevents grind loss by guiding grounds into portafilter, keeping workbench tidy
Accurate dosing ensures consistent coffee measurements for every shot
Compatible with ROK espresso maker GC portafilter and 49mm baskets for seamless integration
Food-safe glass composite construction for safe, durable use
Minimalist design adds a clean aesthetic to coffee preparation
Summarized by Shop
Avoid grind loss by placing onto the portafilter before filling with coffee.
If you're using a ROK grinder the coffee grounds are beautifully fluffy (the best grinders do this) and can overflow. Place the funnel onto the filter basket, fill with fluffy grounds, leave in place and tamp-through (if you have a ROK tamper) the funnel to avoi
Material
Food-safe glass composite
Color
Black or Clear
Pattern
Solid
Weight
23 g
Dimensions
18 x 11 x 2.4 cm
Compatible with
ROK espresso maker GC portafilter, 49mm baskets
Summarized by Shop
4.2
9 ratings
5
4
3
2
1
Not great, but works
I wrongly assumed this was metallic, but it is 3D printed, light weight and has no magnets to hold it in place, so it is easily knocked off.
But it does work, and it is cheap
A
Anonymous · May 8, 2026
Do th job perfectly
N
Nicolas · April 1, 2026
Works well. I was hoping it would snap onto the rim of the portafilter. It needs some dexterity to hold it it place with the portafilter, while the other hand pours the coffee grounds into the filter, and then tampers them.
