roadrunner

Well, you actually can, depending on how much toothpaste and what type of tube it is. Just squeeze the tube enough to let all the air out, hold it up to the blob of toothpaste, and relax your grip. It will create a vacuum inside that will suck that toothpaste right back into the tube.

But can you put the tube back in the toothpaste would be what Kierkegaard might ask...