These aluminum bottles include an aluminum screw cap. They are perfect for storing products such as lotions, shampoos, massage oil, bubble bath and other beauty products. These aluminum bottles have epoxy phenolic liners, which are highly flexible internal plastic liners. This inner liner is gold in color and resistant to acids, phenol, and many other chemicals. The epoxy-phenolic coating acts as a non-reactive barrier for more long-term packaging with fewer complications.