How do I suggest add-ons and combos on WhatsApp?

List each combo as its own catalog item with its own price, and suggest add-ons while the customer is ordering. On the API, a button or list makes the suggestion one tap.

• Catalog items have a title, photos, price and description, but no listed size or add-on field. Make each combo its own item.
• Adding prices to a catalog only works in certain countries. Where it does not, put the combo price in the description.
• Free app: save quick replies (up to 50) like “Add a drink and make it a combo?” and send one while they order.
• API: reply buttons give up to 3 choices (“Add fries”, “Add a drink”, “No thanks”). A list message offers a longer pick-list.
• Suggest while the chat is open. Inside the 24-hour window you need no template; a later nudge is a template and normally marketing.