Yes, you can make purchases from multiple causes through the Givebacks app.
First, find your causes and add them to your favorite list. Then, use the Buy tab to shop from each store. Add items from multiple causes to your cart. You will complete a separate checkout for each store, but with all your items in one cart, the checkout is quick and easy.
See these articles for more information:
Questions? Click the "?" icon to contact Givebacks Support.