Is it four 4 oz. bottles or four 16 oz. bottles? I don't want to deal with a "bait & switch" situation.

Michele, Thanks for reaching out. We can assure you this listing is for a 4 pack of 16 oz. bottles of Angostura Aromatic Bitters. If you experience any problems once your order is placed, feel free to reach out and we will rectify the issue. Best, Harrison Caputo's Online

how many 16 oz bottles are included?

They are included four 16 oz bottles. If you have any questions or need assistance, please don't hesitate to ask. Thank you for considering our product!

Is this for ONE, 16oz bottle of the bitters or am i missing something in the product description?

They are included four 16 oz bottles. If you have any questions or need assistance, please don't hesitate to ask. Thank you for considering our product!