My friend Spring asked me about the meaning of having to eat from two bowls. I did some checking on Chinese idioms and from what was found, rice bowl to the Chinese would symbolise means of livelihood. So eating from two bowls would most probably mean living on earnings from two jobs.
Here are more symbolic meanings related to the rice bowl.
English: RICE BOWL
Explanation: Job or means of income; Similar to English "bread and butter", but for Chinese, bread is rice.
English: BREAK THE RICE BOWL
Explanation: You break your means of eating rice - this means you lost your job.
English: TO PROTECT RICE BOWL
Explanation: Securing or protecting one's means of making a living.
English: IRON RICE BOWL
Explanation: An iron rice bowl would not break, so this describes a very secure job.
English: GOLD RICE BOWL
Explanation: Same as an "iron rice bowl", but perhaps more emphasis on "good pay".