Windolene is a window-cleaning chemical in a pump-action spray bottle. I think the closest major brand elsewhere in the world would be Windex.
Cornettos are an ice cream product from Walls (or Streets in Australia). I believe that NestlĂ©’s competing product Drumsticks are the best-known alternative elsewhere in the world? Cornettos are iconic thanks to the memorable “opera singer ad” which ran during the 80s and 90s, and also because they’re repeatedly referenced in Edgar Wright/Simon Pegg’s (excellent) film trilogy: Shaun of the Dead, Hot Fuzz, and The World’s End.