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Problem 1 - As you fill it with water, you can't see how full it is. This is a problem with our filtered water, because it goes a little while after to let go of the button. I either don't get enough water, or it slops out..
Problem 2 - See that stupid wide part above the grip area. This is - I assume - designed to support your grip. it is "accidentally" designed to store a little extra water... you know is there so you tip it up to finish off the water and - kabloie - it dumps all the extra water at once so that it spills on you.
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Every time it happens I promise to remember, but when I am working and thinking of other things, I forget and get soaked.
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I just threw the damn thing out.