Types of Bundles available in Simple Bundles

Simple Bundles currently provides three types of Multi-SKU bundles. Depending on your use case and what limitations are acceptable within your team's workflow, you may opt for one over another. 

1. Single-price bundle | add $0 items in orders: This is the simplest to set up and default bundle in Simple Bundles. In this bundle type, the bundle products added to orders are discounted to $0 each (100% discount).
2. Separately-priced items | Remove bundle SKU from order: This bundle allows the bundle to be automatically removed from orders and items to be assigned a specified price. This bundle comes with some limitations around exclusive taxes and discount codes.
3. Infinite options bundle | add unlimited bundle options without variants: This bundle type accepts line item properties which allow customers to select specific bundle options without the use of variants on the bundle and possibly being limited by Shopify's 100 variant limit. In this bundle type, the bundle products added to orders are discounted to $0 each (100% discount). Additional theme configuration may be required.

You can switch the bundle type for each bundle using the selector under the Bundle Type section on the bundle page.

If you would like to enable single-SKU or inventory-only bundling functionality, you can enable this in your preferences section as shown here.