Taking cannabis abroad
The short answer: do not. Taking cannabis across the Dutch border is prohibited, regardless of quantity and regardless of destination.
Export is prohibited
The Dutch Opium Act prohibits exporting cannabis. What is tolerated within the Netherlands stops at the border, and that includes small quantities for personal use.
Including to countries where it is legal
This is the most common misunderstanding. Several countries have relaxed their cannabis laws, but that does not mean you may bring it there.
Almost everywhere, regulation applies to the domestic situation, with its own rules on origin and points of sale. Importing from another country falls outside that framework and remains a criminal offence. You would be breaking both Dutch export rules and the destination country’s import rules.
Including products from the experiment
Products bought within the closed supply chain experiment may not cross the border either. The experiment regulates the chain inside the Netherlands and changes nothing about export rules.
Including CBD products
Rules on CBD differ considerably between countries, and products freely available in the Netherlands are prohibited in some. Check with the authorities of your destination before travelling.
The consequences
These vary widely by country, from confiscation and a fine to severe penalties. Outside Europe the consequences can be serious. Do not assume the Dutch situation counts as a mitigating circumstance elsewhere.
Practical advice
Buy what you use here, and leave the rest. Before travelling, check bags and coat pockets for any remains. In practice, that is where most problems begin.
Sources
Government of the Netherlands · Dutch Customs · Ministry of Foreign Affairs
This article is general information and not advice. Cannabis use is not without risk. For independent information and help, contact the Trimbos Institute, Drugsinfo or your doctor.