The contract size for milk future is 200K pounds, a little over 23K gallons, or about 500 years of my family's consumption.

Futures are not a good answer for my use case as a dairy consumer.

It's like you never heard of wholesalers vs. retailers.

You're acting like your family has to buy milk by the tankerful or flour by the palletful.

More examples from daily life: The electricity market, board lots vs. odd lots in stock trading, fractional shares, restaurant supply stores.