First of all, the glass bottle should be pure and translucent. If the glass bottle looks like there are impurities and bubbles, it will look rough and affect the beauty of the glass.
Secondly, the mouth of the bottle should be smooth and neat. This affects the comfort of drinking water on the one hand, and more directly affects the sealing of the glass bottle.
Finally, the glass bottle body is thicker for the better. Glass bottles have thick and thin, in terms of material and quality try to pick a thicker glass bottle, so that both in a certain degree of insulation, resistance to wear and tear.