Cold Spring Brewing/ Land O' Pop Crate

It seems as though I have two things in one here. This was in my grandfather's garage for years in northern Minnesota. It is a painted wooden crated that Says "Drink Land O' Pop Beverages" in red letters. But you can see another sign under the paint that almost looks engraved..the letters look depressed into the wood. It reads "Cold Spring Brewing, Cold Spring, Minn". I have found a lot of information on the Brewery, but none on "Land O' Pop". I think it may have been part of the brewery's way of staying in business during prohibition, by creating a soft drink, or pop, as us midwesterners say. Either way, It seems like I have something old and linked to the early days of consumer products in Minnesota. Any thoughts?