Size clarifications - Many bars have multiple sized liquor pours (1oz, 2oz, 3oz) and for this reason we have those sizes predefined and demonstrated in the demo onePOS database. Not all bars use all of the sizes, but for clarifications sake:
The parent item represents a "Single" pour. The following example uses "Bacardi, Captain Morgan, Cruzan..." These will not be a size level, but rather reference their child sizes.
Rx = "Rocks" pour. In this example, size level 1 uses the "Rx" prepend. Bars will often use this for a slightly bigger pour of liquor that does not come with a mixer but will need to cost more to cover the cost of more liquor, a big ice cube, bitters... "I'll have a whiskey on the rocks."
Mrt = "Martini" pour. Like rocks, a martini pour is typically more than a single but could be less or more than a double, depending on the bar.
Dbl = "Double" pour. It's important to remember that while these sizes are common in the industry, they are used to fit the bar's operations. While it may actually be twice as much liquor as a single, this isn't always the case.