<?php

$tea_content = array(
    array(
        'type' => 'toggle',
        'title' => 'Get ready to rumble!',
        'id' => 'my_toggle_field_id',
        'default' => true,
        'description' => 'Put it on to get started',
    ),
);

Retrieve data

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

true