The “standard bottle height”? You mean the height of the other bottle? Ain’t no standard, son. I used to open bottles that large with 30 tiny pills inside of them. Whatever bottle is cheapest to acquire en masse is that products’ standard. Now drown in plastic.

1. Obtain bottle of different size.

2. Pour bottle of undesirable height into new bottle.

3. Label new bottle.

What if your shelf is not standard height and the zzquil bottle is actually standard height and the other bottle is shorter than standard height??