As we replace bonding pairs with nonbonding pairs the molecular geometry changes to seesaw (four bonding and one nonbonding), T-shaped (three bonding and two nonbonding) and linear (two bonding and three nonbonding).
There are 12 bottles in a standard case of wine. Each of those bottles normally contains 750 milliliters of wine, giving the case a total of 9 liters. If a case contains anything other than 12 bottles, the wine manufacturer or seller usually notes the change for consumers.
With a four-ounce pour you are under-pouring by about twenty percent of the industry norm. A standard 750 milliliter bottle of wine is 25.36 ounces and the industry standard is four to five glasses per bottle. With a five-ounce pour, the math works perfectly (five 5-ounce glasses, even allowing for some drips), unless you have a large amount of sediment at the bottom of the bottle.