Coffee Single Dose Carrier + Funnel > Scale (Updated)

This is a centrifuge lab tube carrier with a funnel, designed to sit on your scale for efficiently preparing multiple single-dose coffee bean portions.

The empty lab tube is loaded through the top funnel, filled with coffee beans, and then removed via the side opening. I left an opening behind the cone base to prevent chaff and dust from accumulating there. Compatible with 50ml lab tubes, both flat-bottom and conical.

▲ Important: This model performs best with conical-bottom tubes and shorter flat-bottom tubes (114mm). I’ve tested different brands, and while slightly longer tubes (117.5mm) still work, they don’t release as smoothly as the shorter ones.

▲ Version update: 17th of April 2025 

I’ve created a new version called Centrifuge Funnel THICK with thicker walls and a few other tweaks to better withstand the rough handling from your barista friends.

If interested, I have made a Triangular Tube Holder to go with it.