Coffee bags are portion-sized sachets of ground roasted coffee designed for easy infusion — the coffee world’s answer to the tea bag. Hot water releases the brew directly in the cup, no machine required. They suit travel, offices, and food service, where convenience outweighs the ritual of grinding and brewing. The grind must be tuned to the bag: fine enough to extract in a few minutes of steeping, coarse enough not to turn the cup silty. Sealed promptly after grinding, they protect the volatile aromatics that define fresh coffee flavour.