Your bottle is definitely a soda bottle. It was produced by the Sun Spot Beverage Co. of Baltimore, Maryland. The Sun Spot trade mark was filed in 1938. The Dandy trademark was filed in 1939. They distributed Dandy in numerous states. The link is to one like yours on eBay, but the label is either worn off or it had a paper label. Notice the [G] on the base which is for the Glenshaw Glass Co. I believe your bottle has the same mark. If so there should be some small letters on the lip of the bottle. They are date codes used by Glenshaw. See the attached chart for a general idea for the various dates. I attached some additional images that should be of interest to you.