Copper prices have hit record highs as an ongoing trade war between the U.S. and its key trading partners threatens to squeeze supplies of the vital metal. Buyers in the U.S. have been stocking up on copper ahead of potential tariffs.

Most Americans don’t wake up in the morning thinking about the price of copper. But as prices rise to record highs, Americans might soon feel the pain on some common products — if they aren’t already.

The most actively traded copper futures contract in New York hit $5.374 per pound Wednesday morning before settling at a record $5.24 per pound. Copper prices have soared 30% this