The 6-bottle package carries a specific value worth understanding precisely: the lowest cost per bottle among the three package sizes, plus free shipping.
$49/bottle for a 180-day supply, totaling $294, with free US shipping — this site's own materials describe it directly as the best value tier.
Given this site's own materials describing most people not judging results until three to four weeks in, and recommending this tier specifically for consistent, longer-term use, a 180-day supply gives genuine room to evaluate fairly.