I just got this back from WLabs:
"Hi Bill,
Thank you for the feedback. We are constantly looking for feedback on our packaging from the brewing and homebrewing community (without it, we will never be able to make wanted improvements).
For the most part the feedback on the Purepitch packs have been positive, we have been able to increase cell count, viability, and shelf life with Purepitch. Hopefully in a future improvement of the Purepitch pack we can add the ability to tear the pack open.
I think most people hold the bag loosely from the edges when the cut the top off the pack and it usually doesnt spill out if that helps.
Thanks!"
They really need to put something like a ziplock top like what you see with sandwich meat..That would solve the problem imho.