First of all, PET is so popular due to its affordable price and functionality. PET is cheap, light and flexible.
Low weight is a great advantage in transportation, but many people think that light-weighing packaging is cheap and not durable, so the product inside it is also cheap and of poor quality. Glass packaging is heavier, seems more sustainable and implies better quality.
Still, technology keeps going on, and now we have such thing as Glass-Pet. It is a special kind of PET with thicker sides. Modern Glass-Pet is hard to distinguish from actual glass, but is lighter in weight and damage-proof in addition.
Accessories can make a great difference. We may use pumps, atomizers with golden or silver metalized rings, for instance. Such closures look much more elegant and sophisticated than ordinary transparent or white plastic.
Now we have 2 types of dyes: dry and liquid, so we can color the bottle in any tint of any color.