Answer:
What can be swallowed, but can swallow you?
Different lights do make me strange, thus into different sizes I will change.
What is that over the head and under the hat?
What does man love more than life, fear more than death or mortal strife. What the poor have, the rich require, and what contented men desire. What the miser spends, and the spendthrift saves. And all men carry to their graves.
Blend a teapot shot so the pearlies won’t rot!
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?