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Use "fillers" in a sentence
"Then put in fillers, which are small objects to fill in the spaces and give the arrangement a lush look of fullness."
"Butchers save end products and scraps, grind them up, pack them into cylinders, and then mix in fillers to add extra protein, texture, or taste or just to make sure that the whole mass sticks together properly."
"Instead, I’ve bought a couple of packages of ink re-fillers from a big box retailer."