Vintage Silvered Glass Dewar Flask Carboy large 13”

Found this cool vintage silvered glass carboy or dewar flask. It's got that classic spherical shape and a mirrored finish that looks pretty neat. Not sure exactly what it was used for originally, maybe some kind of lab equipment or just a unique decor piece. It's sitting in a cardboard box right now to keep it safe. Has a blue cap on the neck. Definitely a conversation starter if you're into industrial or scientific antiques. It stands about 13 inches tall and is pretty heavy glass.