Bees collect olive essence from martini trees (duh). To harvest olive oil, a Glitch approaches a swarm of bees with an empty bottle--much like firefly whistling.
I love the science of Ur. The way it works is you come up with a hypothesis for how something works that doesn't even exist yet, then you tell everyone about it, then the Giants consider your hypothesis and then maybe do something that may or may not be related to it!
If the world of Earth worked this way, many of the philosophies that people hold for some reason wouldn't be wrong!
Bees are amazing creatures. They are source cats' purring sound and are a natural Nicholas Cage repellant. Though, I would like to table them for a moment, and get back to the subject of these Martini Trees...