This shape came to me while I was getting ready for sleep last night. I call it twist because it seems like a twisted regular box to me.
If you want to stand up on one end like my top picture, I recommend taping the bottom end shut. The snack size Kit Kats are there for scale. The ends are 1x3 inches, and it stands 4 inches tall.
Click on the image for the full size 100 ppi versions. Print on cardstock, score all folds. The tab is big enough to use double sided tape to assemble.