Half-full or half-empty?

if I have two identical glasses, and a 100% liquid transfer rate (no water droplets are left on the inside of the glass)

if I pour half a glass of water into the glass, is it half full or half empty

if I have a full glass and pour out half, is it half full or half empty

if I have a full glass, and drink half of it, is it half-full or half-empty?

now

if I drink half a cup of water, pour the remaining half into the second glass, is the second glass half-full or half-empty?

if I do the same, but pour the second cup back into the first glass, is it half-full or half-empty?

on one hand, I drank half of the water, but at the same time I also poured in half of the water