A tool packaged for retail sale has a tool handle including a handle outer surface and an internal storage channel within the handle and having a channel opening facilitating selective access to the storage channel. A removable handle cap with a cap-exterior surface is installed over the channel opening in order to close off the storage channel. The handle cap is retained in place by a cap-restraining strip fabricated from a tear-resistant material. More specifically, a central portion of the cap-restraining strip is disposed over at least a portion of the cap-exterior surface, while portions of the cap-restraining strip on opposite sides of the central portion are disposed to extend along mutually opposite sides of the handle outer surface. A wrapper securely binds the portions of the cap-restraining strip located on opposite sides of the handle outer surface, thereby preventing removal of the handle cap without destruction of the wrapper.