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You can bring as many 3 oz bottles as can fit in a quart-sized plastic bag in your carry-on luggage when flying.
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You can bring as many 100ml bottles of liquid as can fit in a single quart-sized clear plastic bag in your carry-on luggage when flying.
You can carry up to 5 bottles of perfume from the USA to India for personal use.
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As many that will fit in a quart-sized ziploc baggie.
you can carry 5 litres of liquor in domestic flights in India as checked baggages.
Because glass bottles can be used for many things, for examole, wine bottles. Different brands of wine have different coloured bottles. Also, they break easily, and plastic bottles are a lot easier carry around.
The number of wine bottles you can carry on a plane depends on the airline's policies and the country's regulations. Generally, you are allowed to bring a limited amount of alcohol in your carry-on luggage, usually up to 5 liters per person. It's important to check with the airline and the specific country's rules before packing wine in your luggage.
Bottles come in many sizes.
You can bring as many bottles of liquor as you like (and can carry) from Puerto Rico to New York. Puerto Rico is part of the United States and you will not cross a customs border when traveling between those two locations.
They have many, up to 40 bottles!