Everyone’s favourite.

 
$args = array( 
'label' => __('Products'),
'singular_label' => __('Product'),
'public' => true, 
'show_ui' => true, 
'capability_type' => 'page',
'hierarchical' => false, 
'rewrite' => true, 
'query_var' => 'products',
'supports' => array('title', 'thumbnail') 
); 
register_post_type( 'product' , $args );