Actually, both! This versatile booster seat is the perfect pick-me-up for brunch at gram’s, dinner downtown and snacks back at home. The tray insert has a sippy cup holder and divided sections, so there’s no need for a plate! (How great is that?) The smooth seat is sleek and easy to clean, with no crumb-trapping crevices. The tray insert (which doubles as a tray cover) fits right in the dishwasher for sanitizing. And you can store the tray right under the seat when you’re on the go. Just use the convenient over-the-shoulder strap to carry it with you anywhere!