I don't quite understand. Do you want people who buy the theme to have their customers buy a cup of coffee over the Internet before they come to the store? That isn't going to work. Or, do you want people to use the theme to buy a cup of coffee at a kiosk in a store then step up to the counter?

If it is the latter, you are wasting your time trying to add a buy button of that kind to a coffee theme. You need an integrated (custom) system designed to do this with both one or more kiosks, one or more displays for the staff to use, and a management interface. All of this will have to do real-time transaction processing using a credit card payment processor.

Anybody who blithely says something like "Add a PayPal button" has no understanding about what is involved.

Nope neither is what I want to do.

This is a theme, I will be changing it to suit my client.

My client isn't a coffee shop or anything. They are a supplier and this is a very nice theme.

They will be selling coffee beans and tea, so hence the reason for a buy button.

Thanks.

Or I would be open to suggestions for an eCommerce theme for a coffee distributor.

Well first we should know what ecommerce solution is the client going to use? If it's a simple paypal site then you just copy and paste the paypal 'buy' button code provided by paypal and inject that into the template.

And with other ecommerce solutions, I would bet the process is very similar. The ecommerce engine provides you with a html code and you inject it to the themes source code in the appropriate place.

Paypal single item buy now:
https://www.paypal.com/cgi-bin/websc...-intro-outside

Paypal add to cart:
https://www.paypal.com/cgi-bin/websc...-intro-outside

Other ecommerce-solution:
Google.com --> add 'ecommerce solution name' buy button to website/wordpress
example: client uses woocommerce+wordpress--> add woocommerce buy button to wordpress

Thanks for that, makes sense and good idea.

Thanks for the suggestion. Will check that out too.

If you want to create an online store with Wordpress, try WooCommerce. It's very powerful yet easy to set up.

Thanks Gavan. Will definitely check it out.