In Russian we also do this 1uite a lot. Xerox, google and photoshop are absolutely normal for activities. Also, thermos for vacuum flask. Dandy is a term for NES clones. doshirak or rolton for ramen noodles. Fairy for dish washing liquid.

Sure, it is also klaxon, cellophane and scotch.

Interesting, that champagne is the only case I know that won the fight. My friends often say sparkling wine for generic brands.