Many squeezable bottles are hard to stand up on their tops (to let their viscous contents drain down close to the lid, when they aren’t in use).
Even with a lot of shaking, it can take a long time to get this kind of fluid to near the exit.
To speed up delivery of your sauce or salad cream, today’s invention is a set of internal shelves moulded into such a bottle.
When the contents are being squeezed out, some stays on these shelves (left picture).
As the bottle empties, waiting time gets huge, but the shelves hold enough liquid, close enough to the exit, that it only takes a second or two to allow a useful dollop to be quickly delivered (right picture).