With TheCartPress 1.4.0 we have added a new awesome feature, “Copy orders” or “Link to precompiled carts, ready for checkout”.
To enabled this functionality you have to create an order and check the new field “Public (to copy)”. Activating this feature allow to add a shortcode in any page to show a button to add multiple items in the shopping cart.
You have to use a shortcode, in any page where you want to display the “copy” button. The shortcode has this format:
See it in action: http://thecartpress.com/demo/copy-to-demo/
Enjoy with this new feature.