If you want to experience astringency go to your local well stocked bar and ask for a taste of Campari. Now here's where it get's tricky. Ignore the smell, appearance, and taste and just think about the sensations as you drink it and afterwards on your palate. It will not take much unless you are Italian in which case you probably had it on your pacifier as a child.
I'll test this out. I never thought of Campari as astringent. Maybe the line between harshly bitter and astringent is even finer than we think. Maybe I'm not noticing because of the orange just mixed in