This is amazingly cheap, it works out at approx 7p for over a litre - that's amazing.
I started off by soaking 4 cups of oat flakes in 4 cups of water. By the way, this isn't American 'cup measurements' this is literally a cup or mug, any size because the ratio of oats to water will be the same. Some recipes say soak for one hour but I left mine overnight.
Whizz it up, it does't take long and looks a lovely creamy white colour.
Strain it, as you can see this is just an ordinary kitchen strainer.
Because there's a lot of sediment, I strained it again through a nylon bag on stilts (I got his from Ebay for under £2), it's been very useful for straining all sorts of things.
You'll have the 'gunge' left over, don't throw this away it still contains some nutrition. I made a vegetable curry the same day and put it in with the sauce and it thickened it up well. You could put it in soups and stews as well.
So here is the finished product and I can tell you it's very 'drinkable', maybe needs a little sweetening for some tastes, or a little vanilla essence is nice.
Before using milks made from nuts, seeds, grains etc., shake them up well because no matter how much you strain them, there will always be a little sediment in the bottom of the bottle.