Does Frequently Bought Together support variants?

Frequently Bought Together has a built-in variant selector for each product so that your customers can select the proper variant combination that fit their needs. 

There is a single variant selector for each product that shows all available combinations of variants that can be purchased instead of showing a variant selector for each option, making it more usable for your visitors:

Please, check our demo store at  https://frequently-bought.myshopify.com/collections/summer-16/products/awesome-sneakers to see the functionality in action.