The way to adjudge the 5th precept (stop to drink intoxicants)

People 5th precept has not broken when drink a very low alcohol because the alcohol has not enough to make your unwholesome consciousness arise after drink.

This precept have 4 elements to done. You already done the last 3 elements, except the first "Mada-niyam -- intoxicants". (Patu-kamyata-cittam -- chanda to drink, chanda is not desire, and you have chanda to drink anything in that glass).

My reply is very difference from the others because I decided this from these all conditions:

1. pali included amajjasaññī (innocent of that beverage), too.
2. commentary said "must broken by unwholesome consciousness", but the elements of sikkhapada have not Madanīyasaññī .
3. This sikkhapada also not included in 10 akusalakammapatha, too. But it is in 5 sikkhapada, that can let people go to niraya.

So the way to broke this precept should be unwholesome consciousness, that arise after drink, because of that drinking. And that unwholesome consciousness must can be done someone in 10 akusalakammapatha, too.

However, there are some significant difference between vinaya's commentaries, that most were author by upali-etadagga at buddha's lifespan, then translated to pali by buddhaghosa at  5th-century,  sutta&abhidhamma's commentaries, that most were author by sariputta-aggasavaka at buddha's lifespan, then translated to pali by buddhaghosa at  5th-century, and sub-commentaries, that were translated by dhammapala at about 11th-century:

vinayapitaka: majje amajjasaññī pivati, āpatti pācittiyassaฯ amajje majjasaññī, āpatti dukkaṭassaฯ amajje vematiko, āpatti dukkaṭassaฯ

upali