Following is excerpt from Frank Herbert's Dune:
You have no idea how much wealth is involved, Feyd," the Baron said. "Not in your wildest imaginings. To begin, we'll have an irrevocable directorship in the CHOAM Company."
Feyd-Rautha nodded. Wealth was the thing. CHOAM was the key to wealth, each noble House dipping from the company's coffers whatever it could under the power of the directorships.
Highlighted is the part I struggle to understand. Looks like something similar to "each noble House taking advantage of the company's money", but I can't find such meaning for the verb "dip". And it seems that use of the verb "dip" with the preposition "from" isn't common too.