This site states this specific instruction directly: check the product and total before you pay.
Worth reading this instruction as the direct, practical response to this site's own seller-name disclosure — confirming the product and price protects you regardless of which store name appears at checkout.
Confirm the package size (2, 3, or 6 bottles), the per-bottle price, and the total before submitting payment, regardless of the seller name shown on the checkout page.