And here’s one where they might’ve gotten it wrong

Meet Welch’s new AquaJuice. 

Now I know – you’re trying to figure out what it is.  Lemme guess – water and juice?  Well, the Welch’s website calls AquaJuice a “great-tasting naturally lighter juice beverage for kids.” (Emphasis mine).  The Motley Fool’s CAPS blog investigates a bit further and finds out the truth: the label reveals that the product is 50% juice, 50% water.  Eureka!  That’d be aqua + juice, wouldn’t it?

I guess not, if you’re the PTO.  Who knew the prefix “aqua-” had lost its status as the foreign equivalent of water and become suggestive?  Interestingly, Welch’s entered this statement in the record: “The term “AQUA” has no
meaning or significance in relation to the goods apart from that of a
trademark.”  Really?  And yet the PTO bought it.  Oh well.