Crest doesn't care, I bet it will take them ages to fix it

Okay 1st thing... put on pants 😜. Then, drive to the hardware store... ask for the funnel section... buy a tiny funnel. While your there get some 1by10 pine stock and treat yourself with a bag of beef jerky. Go home... use that 1x10 pine to build yourself a jig for the toothpaste tube and that tiny funnel you bought. Assemble the jig with the tube and funnel in place. Now find yourself a small non-reactive kitchen pot, or even a coffee cup would work... scoop up that toothpaste put it in that pot or cup... heat it slowly to 140° degrees this will kill any pathogens and make it easier to pour it back into the tube. Use the jig and pour the warm toothpaste into the funnel and thus back into the tube. All in all...parts, labor n' gas... less than 50 bucks... cheap 😁. Good luck, I believe in you bud 👍.