We use USPS Priority Mail because we compared it to standard shipping costs, and Priority Mail is actually cheaper!  It also means you'll also get your shipment much faster.

Even then, we have decided to subsidize some of the shipping costs since our goal is to keep the shipping cost under $5 for shipping a 6-pack, and under $7 for a 12-pack.

So if you do the math, you save more on shipping if you buy a 12-pack, and we also provide a $1 discount for a 12-pack compared to buying two 6-packs separately.