<?php

$tea_content = array(
    array(
        'type' => 'font',
        'title' => 'Choose your style',
        'id' => 'my_font_field_id',
        'default' => 'my_gorgeous_font',
        'description' => 'Tell us how to scribe :D',
        'fonts' => true,
        'options' => array(
            'PT+Sans' => array('PT Sans', 'PT Sans', '400,500'),
        ),
    )
);
1234

Retrieve data

Using the _get_option('my_font_field_id') method, you'll get (with a json_encode() display):

"Bree+Serif"