Bind custom shipping fields to the order

I’ve created custom shipping fields:

<input id='{$fee->meta_key}' type='radio' name='shipping_fee_{$_product->get_id()}' value='{$fee->meta_value}' />
                            <label for='{$fee->meta_key}'>{$fee->meta_value}</label>

For each product in the order there will be separate shipping fee. Where have to save this data ( in which table ) and what names and values should the fields has? I am setting different name by the product id now. $fee->meta_value is the name of the shipping method. If you need more information will provide. Just don’t know what more in this moment. Thank you!
P.S. Make order with the link above – “Link to the page you need help with:”
P.S.2. I am very new in wordpress 🙂

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