I asked myself the same question before our baseball road trip to Wichita last year from Red Wing, MN. Every Thursday home game, the Wichita Wind Surge tranform into their alter ego, the Turbo Tubs. So I looked it up on their team website and here's what they said about the name.
"The Turbo Tubs identity is a tribute to Wichita with distinct identifiers specific to the city. The wind sail and jet engines propel the porcelain bathtub onward, paying homage to the tub races once held on the Arkansas River. The troll found along the water walk, near the Keeper of the Plains, takes charge as captain, bringing to life the fable tales heard by young and old throughout the community. The branding also includes a color palette of the one-of-a-kind sunsets uniquely occurring in the Midwest geographical region."
The Arkansas River runs right by their ballpark. On a personal note, I love the Turbo Tubs jerseys, and purchased a game worn/team issued jersey from their team shop last year. If you road trip to Wichita, I highly recommend eating at Bite Me BBQ.
So now you know.