Detatchablle toilet seats

I took a quick look on YouTube. This one came up. You slide a couple pins to release the seat. Another one had 1/4 turn knobs to release the seats. The sliding pin version:

If you want quality, don't head to Home Depot.

No idea what a cavit is, and I had no idea why anyone would want a detachable seat. Still don't know about a cavit, but detachable is for easier cleaning.

add a trailing 'y' character.

Perhaps he keeps wine chilled in the toilet tank

Is Cavit good wine? Cavit has consistently championed this varietal in the U.S., earning its well-deserved title of America's #1 Italian Pinot Grigio*. Additionally, Cavit produces a full range of high-quality, approachable and food-friendly wines including Pinot Noir, Prosecco, Chardonnay, Moscato, Rose, and Red Blend.

Something like these?

Cavity occurred to me but it didn't seem to fit... A long linear cavity that is c-shaped. I guess so.

If it's like mine, "a long linear cavity that is c-shaped" is not a bad description. Both the slip-on attachment points and the back of the seat and lid between the 2 attachment points are c-shaped.

Mounting bar:

My seat is 76 years old and still soft and smooth. Used every day too.

They might not want you take them apart at the store, but everything is returnable. Take them home, play with them, if you don't trust them, return them.

Assuming yours are plastic, they sound exactly like mine, except that mine were purchased sometime in the late 80's. I don't recall where I bought them, but I really like them. They make cleaning the toilet much easier and the seat and lid can be washed in a utility sink.