How do Nalgene water bottles stop leakage without a rubber/silicone gasket?

Question

I’ve noticed that Nalgene water bottles don’t use gaskets on the caps, but many other water bottles use them to stop leakage. How do Nalgenes get away without using these seals?

In: Engineering

Answer 1

Internal lip. Look at the inside of a lid and you’ll see a gap with a little ridge. That’s where the top of the water bottle sits.

Science!