Replacement cap with a steel base in case the cap of your steel bottle is lost or broken.
This way, you can continue using your bottle for a longer time.
Compatible with Blafre steel bottles of 300ml, 500ml, and 750ml, and Tutete steel bottles of 350ml, 500ml, and 750ml.
Features: Material: PP, steel, and silicone gasket Leak-proof Dishwasher safe at low temperature Compatible with any size