Helps you get your grinds into your portafilter accurately and without a mess.
Slightly imperfect funnels are also available on sale.
This involves grinding more coffee than will fit untamped in your basket and can improve espresso flavor.
In order to use WDT to break up clumps in your coffee, you need a funnel to prevent spilling.
If you are weighing your dose while grinding, you need a funnel to keep grinds from falling to the side and prevent the coffee mound from tipping out, which would give you a false weight.
Oil from the coffee grinds makes them sticky. That's why we coated our funnel in teflon and used the mathematically optimum "Brachistochrone curve" to shape the inside.
The stainless steel weight of the funnel gives it enough weight to sit stably on the basket, even when shaking the grounds. No need for clips, springs or other gadgets that complicate use.
The outside curve of the funnel is finger shaped to make it easy to lift out with minimal effort.
Adds 22 millimeters of height to your portafilter.