Just got this in Email today..
If you still didn't get the joke, you should look closely on the third line from the end "Without fear of Shmita and foreskin".
Disgusting. Puke in your grape(s) juice stuff. After reading that I'm terriefied I might just discover some grape juice that isn't "foreskin" safe. What's even funnier is that the little box on the far right corner says "Your smart purchase".