Here's my try. I hope I've completely ruined whatever you had hoped.
---
The toothbrush shivered as he saw the sun peaking through the window. He looked over to his most recent companion across the sink. The poor guy didn't have much left in him. At this rate, the toothpaste would be gone in only a few days. The toothbrush looked up to ceiling and sighed.
"It's almost time today." The toothpaste wheezed. "Maybe I'll get lucky, and he'll throw me out early. Maybe."
The toothbrush knew his wish was too much to be true. The one who arrived at the bridge of dark and light would always finish the job. However, he had no reason to tell the toothpaste this. Might as well let him have his hope, as he didn't have anything else.
"Don't worry." The toothbrush began to comfort the toothpaste. "It's only another day or two for you. I've been here for three months now. Who knows how long I'll have to be here for. Most likely, he'll just get rid of us soon."
The toothpaste regained his silence. He was hunched over and curled up. Once upon a time, he had been so strong and large and full of life. The toothbrush looked at himself, his once clean and straight bristles, now only a remnant of their former beauty. The toothbrush felt like the world was coming to an end, just like the night before.
The toothpaste heard the sound of footsteps coming down the hall, and closed his eyes, hoping whatever was coming, would forget for the morning.