Stainless steel will not rust, but galvanized metal may eventually rust.
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I bought two of these regular mouth soap pump lids back in November 2021. I wanted to give them a fair trial use before reviewing them. I bought these and paired them with matching pumps separately. (I liked one style better than the others) The fit and finish is perfect on the lids that I received. These lids work flawlessly and are very attractive. They work exactly as expected when paired with the matching pumps. I'm very pleased with this product.
I love their products and such quick ship times. I would definitely order again and highly recommend them!