The jugs are not inaccurate
it depends on where you stand.
Put the jug on the counter top and bend down to look at it.

Or buy one of these - www.lakeland.co.uk/oxo-good-grips!REG-angled-measuring-jug/F/keyword/measuring+jug/product/2297
( Mrs Entity is in hiding., Wed 2 Jun 2010, 22:56, 2 replies, latest was 14 years ago)

angle of view is only one factor. vertical position of scale is more significant.
and i think we would find that weight is a more accurate method still.
try this wee experiment...
using a jug (whatever jug you fancy) measure 350ml of water. then weigh that water and see how close you were. then try weighing 350g of water.
you can add water 1g at a time if using scales, try doing that with a jug.
( blaireau69 , the Cumbrian Travis Bickle., Thu 3 Jun 2010, 8:31, Reply)

I can't see parallax errors
being that significant.

But it might be worth remembering to measure to the bottom of the meniscus
( sandettie light vessel automatic New Twitter - @bollocksreally, Sat 5 Jun 2010, 1:17, Reply)