Found these for $11 on Amazon. A box of 42 18 mL mixing bottles with lids.
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Also, after hearing and seeing so many recommendations for it I broke down and ordered a Tamiya anti-static cleaning brush.
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I told my wife, "...it has very special properties and can absorb static electrical charge off the surface of plastic models so that they have no static charge and little flecks of dust aren't attracted to them."
I then continued on to tell her that it stores that electricity that it collects until it's full, then you have to get a new one. I subsequently mentioned that you have to be very careful when you handle it cuz it can electrocute you if you don't know how to use it safely.
I'm now pretty confident that my anti-static brush will in fact remain in its rightful resting place in my tool set.