Abstract: A plastic-free, button-lock tube container comprising: a first tube assembly having a cylindrical body with an open end, a closed end, and a first opening formed in the wall of the body; a second tube assembly having a cylindrical body configured to telescopically interface with the first tube assembly along a portion of its length and having a second opening formed therein; a locking apparatus including a manually actuatable button and an elastically deformable structure mechanically coupled to the manually actuatable button such that, when the button-lock tube container is in a closed state, the elastically deformable structure applies an outward radial force to the manually actuatable button such that it projects through the first and second openings and prevents sliding motion between the first and second tube assemblies; wherein the first tube assembly, the second tube assembly, and the locking apparatus are plastic-free components.