Maintaining a copper bottle: cleaning, polishing and storage

A bottle that lasts a lifetime with a little attention

Copper is one of the few materials that can look even better after years of use than on the day you bought it. That just doesn't happen on its own without checking in on it now and then. The good news: maintenance takes a few minutes and supplies already in your kitchen cupboard. And everything below applies not just to your bottle, but just as much to your mug, cup, jug and bracelet: it's all the same solid copper, so the same approach works everywhere.

The lemon-and-salt method

This is by far the best-known way to make copper shine again, and it works because it directly targets the chemistry of patina. The acid in the lemon dissolves the surface oxide layer, while the salt acts as a gentle abrasive to mechanically loosen that layer.

In short: the lemon-and-salt method

• Cut a lemon in half and sprinkle the cut side with a generous layer of coarse salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice).
• Rub it over the copper surface in circles, applying a bit more pressure to the most discoloured spots.
• Let it sit for a minute or two.
• Rinse thoroughly with lukewarm water.
• Dry immediately and completely with a soft cloth.
• No lemon at home? Vinegar with salt works just as well.

For light, everyday shine, a soft, dry polishing cloth is often already enough. Save the lemon-and-salt treatment for when the discolouration really stands out.

The inside of a bottle

Half a lemon gets no further than the neck of a bottle. For the inside, put the juice of half a lemon, a tablespoon of coarse salt and a splash of lukewarm water into the bottle, screw the cap on and shake for a minute or two. Leave it for a few minutes at most, rinse thoroughly a few times with warm water and stand the bottle upside down until it is dry. A dark or patchy inside is normal and safe, by the way; why is explained in dark spots inside your copper bottle.

What's better left alone

The dishwasher is the biggest culprit: the combination of aggressive dishwasher tablets, high temperatures and prolonged exposure to moisture is disastrous for copper, so always wash your copper products by hand. Scouring pads and steel wool are also best avoided, since they scratch the surface, and dirt and discolouration then settle more easily into those scratches. Also don't leave any liquids other than water sitting for hours in a bottle, mug, cup or jug: fruit juice or sports drinks speed up the metal's reaction because of the acids and sugars they contain. More pitfalls like these are in 8 mistakes with a copper bottle.

How to store it best

Dry is the key word. Never leave a bottle, mug, cup or jug wet in a closed bag or cupboard after washing, because trapped moisture actually speeds up the very discolouration you just polished away. That sounds at odds with a bottle that is meant to hold water, and it is not. The water inside belongs there and is a matter of hours; moisture left behind is a matter of days and has nowhere to go. So the difference is not water or no water, but whether it can dry away. Let it drain upside down after use before putting the lid on, store it in a well-ventilated spot, and don't leave it filled for weeks on end if you're not using it.

Maintaining your bracelet: slightly different

You live with a bracelet differently than with a bottle: it comes into contact all day with sweat, hand cream, perfume and sometimes chlorinated pool water. All those substances can make the patina appear a bit faster or more unevenly. So it's best to take your bracelet off before applying cream or perfume and before swimming, and dry it thoroughly whenever it gets wet.

Otherwise, exactly the same lemon-and-salt method works as for your bottle, mug, cup or jug: rub, rinse, dry, done. Want to hold on to that shine afterwards? A hair-thin layer of wax keeps the air off the metal and stretches it from days to weeks, which is what how to keep copper shiny is about. If you'd rather let the natural discolouration appear on your wrist, just let the bracelet do its thing. That's also pure copper doing what it's always done.

Discolouring again anyway? That's part of it

Even with perfect maintenance, copper builds up a bit of patina again over time. That's simply what copper does. Don't think of the lemon-and-salt method as an emergency measure, but as something you do now and then because it's satisfying to see your product shine again.

With just a few minutes of maintenance a week, your copper products will easily last for years. Check out the mug, cup, jug and bracelet, or browse Kopero's whole range.