How to pump same amount of paste every time? I am not sure if I am on the right site for this, but here it goes. I have a friend, named Jason, who makes a hot sauce for a company he runs. It is very pasty (made of pepper flakes in an oil).

The problem is, when Jason makes a batch, he's got to continually stir up the batch while trying to pour an equal (and evenly distributed) amount of the paste into the bottles.

He wants a system that makes it easy and predictable to do this faster. Ideally, he would make the paste, put it in something that keeps it stirred so the flakes don't settle, and from there fill each bottle with the same amount of paste.

What kind of contraption would do this?
This thought came to me, and is so different from my first answer I don't think it makes a good edit to that...

If the product is really 


  made of pepper flakes in an oil


rather than mix a batch at all, measure out a bottle's worth of each, funnel in the flakes, pour in the oil (and seal/heat-process if that's normally done.) Might need some vibration/shaking, but two easily dispensed components mixed in the bottle might be a lot easier than getting the mixture nicely dispensed.