"A-la-carte vessel collections let you buy individual pieces rather than rigid sets, including tiny six-ounce containers that are ideal for leftover sauces or mirepoix; both snap-on lids and press-in wood varieties form a tight, vacuum-like seal that keeps food fresh. Reviewers prefer glass because it stacks better and resists holding food scents, and the flexibility to buy exactly the sizes you need is a major advantage." - Eater Staff