What am I?

A container holding water but not a cup. If you want to find me, look up. What am I?

related riddles

Forward I am heavy, backwards I am not. What am I?

I am a number with a couple of friends, quarter a dozen, and you'll find me again. What am I?

Violet, indigo, blue and green, yellow, orange and red; these are the colors you have seen after the storm has fled. What am I?