Tools & products I use myself
Transparent recommendations from my daily life as a developer and maker.
Coffee Rings is an independent project. I have used some of the products listed here for a long time. If you choose one through my link, you indirectly support further development of the app.
Note: Some links are affiliate links.
Why this page exists
I only recommend products that I personally use and that I am still satisfied with over time.
This page is not a comparison platform and not a ranking. The goal is not to crown the "best" product on the market.
Instead, I share my personal setup and experience including strengths and limitations.
If you decide on one of these products anyway, you can buy through my link. I may receive a commission while your price stays the same.
Snapmaker U1 – my 3D printing setup
Why I bought it
I wanted a system with an enclosed build, high stability, and reliable results with PLA, PETG, and TPU. In my setup, the U1 fits this gap very well.
Quick facts
- According to the manufacturer, 4 toolheads for multi-color and multi-material printing
- According to the manufacturer, 270 x 270 x 270 mm build volume
- According to the manufacturer, up to 500 mm/s and up to 20,000 mm/s²
- According to the manufacturer, automatic calibration including bed leveling, input shaping, pressure advance, and toolhead offset
These technical figures are based on official U1 specs and FAQ information from Snapmaker.
What I like
- Very stable mechanical base for technical parts
- Strong print quality with clean profiles
- More flexibility than typical entry-level printers
- Good overall balance between convenience and control
Where it is less ideal
- Pricing is in the upper segment
- For pure PLA use, it can be more system than you need
- The learning curve is steeper than simple plug-and-play printers
Who it is for
A good fit for makers who print regularly, want to work with materials and process tuning, and value repeatable quality. Less ideal if you only print occasional simple PLA parts.
5% off your Snapmaker cart - just choose the relevant store:
Biogena ONE – daily supplementation
Why I use it
As a developer, I spend many hours at a desk. Biogena ONE is a simple way for me to cover the basics in a structured routine.
Quick facts
- All-in-one instead of many separate products
- Simple morning routine with low overhead
- Clear ingredient declaration
What I find useful
- One product instead of multiple single supplements
- Broad basic coverage with common core nutrients
- Good tolerability in my case
- Supports a consistent daily routine
What to view critically
- Not a replacement for balanced nutrition, sleep, training, or stress management
- Many ingredients are optional depending on the person
- Iron* is not suitable for everyone, ideally check based on blood markers
- Pricing is in the upper segment, but reducible, for example to 54.50 euros in the 12-month subscription
Who it is for
Useful with high daily load, little interest in supplement management, and a preference for a clear routine. Less useful when your nutrition and supplement strategy is already highly individualized and price-optimized.
Coupon code
MORGEN5 for an additional 5 percent off, including the ongoing monthly subscription as long as it remains active
* According to Biogena, the rollout to the new formula will happen automatically within the next 4-8 weeks. This includes adding iron and replacing sucralose with natural monk fruit sweetening.
Transparency
Some links on this page are affiliate links. If you purchase through them, I receive a commission. This does not make it more expensive for you, and with the listed codes it can even become cheaper.
These recommendations are based on my personal use and do not constitute medical or technical advice.