title: How to pass values from product to cart page in shopify
body: <p>in my product page i have this input field for quantity:</p>
  
  <pre><code>&lt;input min={{variant.title}} max="240"type="number" id="qty" name="qty" value={{variant.title}} /&gt;
  </code></pre>
  
  <p>the value of variant.title is 12, it represents the minimum amount that you could order</p>
  
  <p>my concern is that when i click add to cart button, how do i pass the quantity input value to the quantity input field in cart page?</p>
  
  <p>im pretty sure that the block of code below is the looping for the cart values, but where is the cart object assembled?</p>
  
  <p></p>
  
  <pre><code>      {% for item in cart.items %}
        {% include 'cart-item' with item %}
        {% endfor %}
  </code></pre>
  
  <p></p>