Cross-selling your products when a customer is adding an item to their basket is really easy with Flipdish. You can simply create a modifier group, adding the relevant products to it, and then add that group to a product - usually towards the end of the flow. 

In the guide below, we'll create a group of drinks that we'd like to add as a cross-sell to our "Burger" product. 

Steps

1. In your Flipdish Portal, create a modifier group.
   1. Navigate to product management -> modifier groups
   2. Click "Create new modifier group"
2. Give the group a name, such as "Add a drink?"
3. Click "add modifier" to see all modifiers and products that you can add to the group
4. Select the products you'd like to add 
   1. Note: Only products without their own modifier groups can be added.
5. Ensure that the "Customer can select" value is "Any number - selection is optional"
6. Click save to save the modifier group
7. Navigate to the product you'd like to cross-sell these items in
8. Select "Add modifier group" 
9. In the side panel, select the group you just create
10. Click save. 

Congratulations! Your customers will now be presented with this cross-sell group for this product. Repeat the above steps for as many cross-sells you'd like to create.