Help passing drop down values to another form

I'm trying to pass a drop down value on a form on one page to a form on the next page and haven't figured it out just yet. I know I'm missing something, just not sure what.

Here's the simple dropdown:

input type="hidden" name="product[]" value="necklace1">
<select name="product[]">
<option value="black cord">black 18 inch rubber cord</option>
<option value="silver chain">18 inch sterling silver box chain</option>
<option value="blue cord-18">blue 18 inch rubber cord</option></select>

On the next page, here's the variable:

$cord = ($_POST['product[]']);

Further down on the page, here's the select data element:

<input type="hidden" name="product[]" value="<?php echo $cord; ?>">

I know I'm doing something wrong, after some hefty google trolling, just can't figure out exactly what, but I know I'm not passing the selected value to the next page. Any ideas?

$cord = ($_POST['product']);

The drop-down value is fighting with the actual product value and overwrites the product name. There is actually a hidden field for the product name:

<INPUT TYPE="HIDDEN" NAME="product" VALUE="<?php echo $product; ?>">

How do I get it to interact with this line:
<input type="hidden" name="product[]" value="<?php echo $cord[1]; ?>">

Actually on the processed Shopping Cart site the information appears this way:

product,dropdown value

I've tried a few things and gotten the word "Array" to appear not exactly what I'm after either. Or with some tweaking I get "ArrayArray" Do I need to repeat the select form value?