"Without work, I was empty as a coke bottle." is the simile used to describe Manny's relation with work.
Step-by-step explanation:
Simile is a literary device that is used to make comparison of one thing with the other. Unlike metaphor, it does not make direct comparisons. It makes comparisons with the use of words like "as" and "like" of one thing with the other.
In the lesson "Parrot in the oven", the relationship of Manny has been described with work using a simile. In this he said that without work, he was empty as a coke bottle. This showed that he really loved to work and without work he thought that there is no worth of the person.