Hello Leonardo,

Which version of Odoo do you use? I am checking your scenario on 18.3, and what you probably want to do is:

• In your Combo Product form, click on Combo Choice for drinks
• A popup menu should open, with listed items (your drinks) - add an extra price for each drink you want to

With this configuration, user/cashier will have the option to ”upgrade” the drink, for this extra price.

Best Regards,

Dawid Gacek, Adapt IT