Maybe I'm stretching the analogy too far here, but the compartiments in your tray can have little labels to indicate what should go where. So if, like me, you prefer carrots over peas, the server can just pick those delicious sweet things out for you, you don't want the peas taking up space in your tray, as that makes it heavier to carry back to your table.
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Maybe I'm stretching the analogy too far here, but the compartiments in your tray can have little labels to indicate what should go where. So if, like me, you prefer carrots over peas, the server can just pick those delicious sweet things out for you, you don't want the peas taking up space in your tray, as that makes it heavier to carry back to your table.