Ring Holder

This is a model I created for a friend to store their ring inside when needed, such as swimming, to keep it safe from outside particulates. This model contains two parts; the lid, and main body which snap together with a twist due to a specially designed mechanism. The lid contains a hole to attach a cord to allow the attachment to carabiners for easy carrying. This is one of my first models so it may have some improvements that I overlooked, feedback is welcome so I can learn and further my design skills, Thx.