Ice is water

Ice is water you can't drink. 
But so is steam, and so are clouds.
And so are seas. It makes you think,
water's not too drinkable! Considering
by parts and whole.

Which makes 
you think,
some thoughts 
don't really add much
depth to life's broad course.
But passing over, washing
through, you might as well 
just sip a few and try the taste. 

And drink your full for now, 
and let the rest just flow, 
or sit, or spill, go
otherwise to waste.