We made an ad for pure water :)

What do you think?

Love it!!

Hahaha - this is great!

I haven't watched TV in ages (so my commercial-watching experience isn't current) but I think it ticks all the "elements of modern shampoo commercial" boxes. It's got just enough tongue-in-cheek satire to be funny but not so much that it can't be taken seriously.
Poking fun, but introducing an actual concept while doing it.

The only serious drawback for me was the high-pitched sped-up voiceover at the end.
I've noticed on radio ads in recent years that often the same voice actor is used as in the main commercial - their voice is sped up to read through the disclaimer, but the pitch doesn't change. It's unnaturally fast (no breaths taken!), but not squeaky.
Or they use an authoritative-but-not-harsh male voice.
I think speeding it up is the crucial bit.

That wall of ingredients is effective, too.

Really well done! Totally share-able, potentially viral stuff - ten points to Gryffindor.