Hey there, @DesertDrinks
Thanks for reaching out today. What you will want to look into are known as "Quanity Breaks" apps. These apps offered tiered discounts based on the quantity of the product that is added to the cart. In this case, it acts a little differently as it isn't considered a "variant" that says 12-pack but the main thing is the customer is going to be aware that they will save $X when they buy 12.
Below I have shared a couple of quantity breaks apps:
Another option is the Bundler App as it allows for bundles to be created on the product or variant level.
If there is anything else I can help you with, please let me know.