Syrup storage

[Jebediah]

How long is properly-bottled, unopened syrup good for when kept on the shelf in the dark at room temperature? What happens once that time has passed? Does the taste turn bad?

Thank you

[DrTimPerkins]

How long is properly-bottled, unopened syrup good for when kept on the shelf in the dark at room temperature?

Stored in what (glass, plastic, tin)?

[Jebediah]

Stored in glass. Thank you

[Daves Maple Farm]

Dr. Tim...why not an answer to each for sealed storage. Say 16 oz. container of glass, plastic and tin?
Keep up the good work. Your comments are, I am sure, appreciated by all.
Dave:)