How can I create standard items - a specific product that I purchase from multiple vendors?

How can I create standard items - a specific product that I purchase from multiple vendors?

We have standard items that we purchase from multiple vendors, example “Bath Towels”.

We will purchase this item from 5 or more vendors. The product is very similar regardless of the vendor. We want to be able to commingle the product in our physical inventory and then it will be sold as the same item to our customers. How can we accomplish this if SKU has to be unique for each item?