Sure, we could just roll our dice.  But tossing them in a mushroom with a spiral staircase is just so much more fun.  Dice towers come with a set of dice and are lightweight for easy transportation.  Just guard your tower like a dragon guards its gold, or another player may walk away with it!
 
Comes in a ton of colors.  Serioutly, so many.  I'm only listing the ones I usually have in stock, but can likely do special requests for a specific color.  I am limited by what kind of filament I have availible, but in general have dozens of colors in stock.