Bought another from a thrift store. Not sure if its old or if its anything worth keeping but it was only 50 cents and I thought the shape was neat. If anyone has any information on this then please tell me.
I was thinking about using it for a vase. I looked up MacBick and found that it has to do with a hospital supply place. It's still pretty cool I guess. Thanks to you both for the information.
Its probably a flask made to be used on a heater/magnetic stirrer plate. Borosilicate glass is good for applications where it has to be quickly heated and cooled without shattering.