yumberry?

So I was at the grocery store looking for peach nectar when I came across Yumberry Juice. Now I had never heard of such a berry, so I was confused. Looking at the front it looks like the berry is a cross of a raspberry and a strawberry. I decided to look at the ingredient list to see if it was a mixture of these and other berries to help clear up my confusion. Reading the ingredients I started thinking my assumption was correct and it was a combination of fruit. Until I got to the words "organic yumberry juice..." I still don't understand. What is a yumberry?!