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hoarder!
Someone who collects beer bottles.
A numismatist is someone who collects coins and/or medals a numismatist
A jar collector.
A labeorphilist collects beer bottles.
Hey, I also heard, from a friend that someone collects plastic milk bottles and then gives wheelchairs in return, however that's all I know, I'm afraid
Someone who collects everything would be called a hoarder - this type of person may have OCD as well.
A Pencil Collector
An aquarist is someone who collects fish in aquariums. They can also simply be called fish keepers. Some collect a variety of fish, while others specialize in a few kinds.
A person who collects shells is known as a conchologist.
A teddy bear collector! jk, i didn't know there was one. A person who collects teddy bears is called an Arctophile.
Someone who collects pens?