Buy one knife. Keep it sharp for twenty years.

Most knife blocks are a slow-motion landfill. Seven or eight stamped-steel blades, plastic handles, a polypropylene block, and a serrated bread knife nobody bought on purpose. Within five years half of it is dull, rusting, or buried in a drawer. One properly chosen chef's knife, sharpened on a schedule, replaces almost all of it.

What to actually buy

A single 8-inch chef's knife in carbon or high-carbon stainless steel will handle 95% of home cooking. Pair it with a small paring knife and, optionally, a serrated bread knife. Three blades, total. Skip the block — a magnetic strip on the wall keeps them visible and dry.

The maintenance routine

• Hone the edge with a steel before every other use — it takes ten seconds and resets the burr.
• Sharpen on a whetstone twice a year. Twenty minutes, no skill required after the first attempt.
• Hand-wash and dry immediately. Dishwashers are how good knives die.
• Use a wooden or composite board. Glass and stone destroy edges in days.

“A sharp knife sharpened often is a tool for life. A dull knife replaced every two years is a subscription to landfill.”

The waste math

A typical home knife block weighs about 280g of mixed plastic and bonded steel on our own scales — a combination no kerbside system separates. A magnetic strip and three good knives, properly cared for, last decades. The blades themselves are pure steel and fully recyclable if they ever do retire.