Vintage soda bottle Whistle a liquid food

Rare Vintage WHISTLE VESS Soda Bottle 30's with all paper labels clear Embossed Glass.

The bottle neck label is for "Drink Billion Bubble Beverages Cold"
Reg U.S. Pat. off.

The main label reads. "WHISTLE"
Reg U.S. Pat. Off.
A Liquid Food"

The label also states that it was "Tested And Approved searel no 2983 Bureau Of Foods Sanitation and Health" Conducted by Good Housekeeping Magazine.

There are a few small flaws on labels mostly at the bottom of the main label. See photos. But in over all condition there in very good shape for a bottle of its age and having any labels are a rarity.

I have seen a few of these bottles over the years and have not seen one before with all there labels in tact as well as the foil wrap in this condition.

The top reads: "VESS" logo... "BEV. REC. U.S .P."
The bottom edge is embossed "ONE PINT 8 FL OZ BOTTLE PAT."

The bottom is embossed "VESS BEVERAGES 9 7"
3

What is liquid food anyway?