In another topic, @linguafood mentioned Mayomust and Mayoracha, products from Hellmans that mix mayo with other condiments. On their site, I also found Buffaranch, Honeyracha, and Ketchili. There’s also Clamato, and a Woody Allen piece once made fun of Lobstermato, a tomato stuffed with lobster. Are there others you might have noticed?
ETA: I originally had “brand names” in the title, but it’s not only brand names. Tangelos and pluots come to mind.
Japan would be the king of portmanteaus if we really were to dissect into their language. They seem to love simplifying Western terms and phrases into these new combo words (e.g., pa-so-con for PC, personal computer).
Appletini - and probably every other fusiony martini drink that is popular in bars today.
I’ve always wondered if ToastChee, was intended as a pormanteau or is it a callback to babytalk where a child couldn’t fully pronounce the word cheese.