Tile Stain

If you had to choose between Rembrandt (whitening toothpaste), Mendadent (fluoride toothpaste), Colgate (toothpaste cavity protector), or Crest (regular dough)? Do you think the price of each toothpaste will make a mark for a better color?
Coloring will be done on unglazed tiles
Stained with:
Cola
Cafe
Grape Juice
Tea
Spaghetti Sauce

If someone as any knowledge or expiernce with these please let me know as soon as possible. Thank you!

Try baking soda mixed with a little salt and a little water.