Yes, it's a mineral water bottle for sure, but can't figure out what the Prairie du Chien has to do with it. I went on the Wisconsin bottles website but it's not listed there.
Unless the company was based in New York and also had a plant in Prairie du Chien. I have seen that before. Brown mfg co. was based in New York but also had a plant in Greeneville. The bottles just said both the city in New York and greeneville, but didn't specify why they were both on the bottle. I'm assuming this is the same with your bottle. Hope this helps.
Wow! Hemi Hampton adds to Nutmeg State history. Thanks. ...I've been to Harwington. Sort of hilly there. Might have to check out an old map. I'll give Case credit--many didn't come home from their attempts at Western mining. How the dog figured into the town and bottle's names is a question. Got to wonder if Case knew John Brown (C'mon remember the guy on the '70s Kansas album cover?!) He showed up in Kansas in 1859 too. Their CT hometowns are fairly close. My, my, CT folk sure do get around...
Traditionally, the name of Prairie du Chien came from the French for Prairie of the Dog, an early Fox chief who lived on the prairie. French Canadians engaged in the fur trade settled on the island by the river, and the fur trade made the first major economic impact on the settlement.