





This set contains a bucket, bag of spawn and (video) instructions.
Did you know that mushrooms grow well on coffee grounds?
That's why we developed the Rotterzwam Grow Kit, so you can turn your own coffee grounds into mushrooms—oyster mushrooms, to be precise. Right on your own kitchen counter. Will you become a #kitchencounterfarmer too?
We've created a special mailing especially for the #kitchen-sink farmer. A series of seven emails packed with video instructions and tips for the growing process.
The grow kit is emphatically not a disposable product. It is carefully assembled in Rotterdam by people distanced from the labor market. It is made from leftover plastic buckets that would otherwise be destroyed and has a recycled cardboard wrapper.
You can choose between a Dutch or English version.
With this promotion code you also get a 15% discount on:




With this growing kit you can convert a 'discarded' yogurt bucket, juice bottle or milk carton into a growing kit for growing oyster mushrooms on coffee grounds.
Using the included (video) instructions, we'll show you how to prepare the packaging for cultivation, how to make substrate from the coffee grounds, and how to ensure a successful harvest. Become a countertop farmer now!
This package contains
- oyster mushroom spawn
- breathable tape
- flyer with instructions
- access to video instructions
Add yourself
- 'discarded' packaging
- coffee grounds
Do you want to produce less coffee grounds?
Then try the Cafaberry edible coffee bars.










Discover the future of coffee with the Cafaberry coffee bar – a blend of great taste and sustainability. Organic cascara, coffee beans, and cocoa butter create a delicious treat with a minimal environmental footprint.
This coffee bar, made from the coffee cherry byproduct cascara, delivers 60 mg of caffeine (the same as an espresso). The gradual absorption of cocoa butter provides sustained energy for several hours, without the jitters. Weighing just 11 grams, it's designed to fit seamlessly into your lifestyle, whether you're going to work, the gym, or embarking on a new adventure.
Our cascara is sourced from 100% organic Peruvian farmers, preventing waste and nourishing ecosystems. By purchasing whole coffee cherries, including cascara, we provide farmers with additional income and reduce CO₂ emissions.
This product contains Caffeine.
Ingredients: Cocoa butter, Coffee beans, Coffee berry (cascara), Cane sugar, Salt, Sunflower Lecithin
Store the product in a place that doesn't get too warm, as this can cause the bar to melt. Keep the product out of direct sunlight.
The caffeine berry bars come in 2 flavors:
- Original - a strong coffee flavour, for lovers of dark chocolate and coffee
- Flat white - a soft cappuccino-like taste (dairy-free)
Packaged in a box of 20 bars. You also have the option of buying a box with a mix of original and flat white (10 bars of each flavor).
*) In the long term we also expect to be able to offer cascara and dark roast flavours.




