Valve Coffee Bags For Freshness: 7 Best Picks for UK (2026)
Freshly roasted coffee behaves like a living thing. For days after it leaves the roaster, it exhales carbon dioxide. Seal it into an ordinary bag and that gas has nowhere to go, so the bag puffs up like a startled pufferfish. Leave the beans open instead and oxygen quietly strips out the flavour you worked … Read more