Abstract: Various aspects of the invention provide user-customizable labels on containers. In one particular example, a label is affixed to an exterior surface of a beverage container. The label comprises a base and a customizable field, with a removable opaque layer of material on the customizable field covering at least a portion of the underlying base. In another example, a user may uniquely identify a container by selectively removing portions of such a removable opaque layer to reveal an underlying second layer of material. The selectively removed portions can thus define a user-created indicium that uniquely identifies the container as the user's own.