This is an internal test of the WordPress ↔ Shopify cart integration. Products below are pulled live from shop.mailcoms.co.uk. Add to basket, adjust quantities in the drawer (bottom-right), then Checkout to confirm the basket carries to Shopify with VAT added.

In-content quick-buy (reusable button)

The block below is a single reusable buy button that can be dropped into any page or blog post via a shortcode: