It's good to group items you often sell together into bundles so you can easily add multiple items to transactions. I'd be happy to give you a hand with creating bundles in QuickBooks Online.
Here are the steps you'll need to follow in order to create a bundle:
1. Click on the Gear icon > Lists > Products and Services > New > Bundle.
2. Enter the bundle name, SKU, description, and which products/services are included.
3. Choose whether you want to display bundle items when printing or sending transactions.