Nesting the Muffin Cups

I waddled out of the paper bag and spotted a bright tumble of silicone muffin cups on the floor. There were orange, yellow, and green ones scattered across the tiles! I nudged a wide orange cup until it sat upright, then rolled a yellow one right against it. With a firm push of my plush belly, I shoved the yellow cup up and over the rim until it plopped neatly inside. They fit together like little bowls! I scurried around gathering three more, bumping each one into the pile until I had a wobbly, colorful stack taller than my nose.