Dairy Queen is suing W.B. Mason, a Massachusetts-based office supplies company for trademark infringement.
The suit was filed in Minnesota District Court on Monday.
The short answer is "Mess with the Blizzard name at your peril," because Minnesota-based DQ has filed the suit to protect the name of its trademark ice creams.
That's because since 2010, W.B. Mason has sold "Blizzard" branded spring water in sizes from 8 ounces to 5 gallons to its customers.
It's also used the name on its copy paper since 2003.
Dairy Queen claims this causes its business irreparable injury as it could lead to confusion for customers, and are seeking an injunction to stop it using the name as well as a cut of its profits from the water.
Reuters notes that it first came to DQ's attention in April, when W.B. Mason submitted trademark applications for Blizzard water.
W.B. Mason has issued a countersuit, saying that nobody in a "long period of what we call co-existence" has confused its products with Dairy Queen's ice creams, Reuters notes.
Let's hope the Berkshire Hathaway-owned DQ doesn't find out about W.B. Mason's other brand, Dilly Bar Soap (we're joking, Warren Buffett, please don't sue us).
Dairy Queen and Blizzards
DQ first started using the Blizzard name six years after it opened its first store in 1940.
There have been multiple incarnations over the years, but its current form of the Blizzard first appeared in 1985, according to its website.
It sold 185 million of the treats in its first year. It currently has 15 Blizzards on the menu.