Mix & match

A mix & match pack sells a Pack of N the shopper fills themselves — "any 2 of our six bars".

Create one

1. Create pack → type Customer picks the mix.
2. Select eligible products — at least two.
3. Add sizes as usual (e.g. 2 for $36, 4 for $64).
4. Publish.

Publishing creates one hidden container product per size (tagged cartrella-pack and cartrella-mix). Shoppers don't browse to containers directly — they use the picker.

The picker

Add the Cartrella pack selector block to the container product's page (see Theme setup). It renders the eligible products as a grid with steppers, enforces the pack size, and adds the pack to the cart with the shopper's selection.

How the selection is protected

The shopper's choice travels with the cart line, but checkout re-validates everything against your published configuration: the selection must match the pack size exactly and contain only eligible products, and every unit is priced at your configured per-item price. A tampered cart can change which eligible items fill the pack — never the price, the count, or the eligibility.