Upzella: Bundle Builder

Upzella Bundle Builder adds a build-your-own-bundle page to your store. Customers mix and match the products you choose and unlock tiered quantity discounts as the bundle grows, with a live progress bar that encourages bigger baskets. Run BOGO (buy X get Y) offers and optional gift wrap, and source bundles from products, a collection, or tags. Discounts apply as automatic discounts at checkout — no codes, and Shop Pay works. Added as a native theme app block, so there is no code to edit.