Customizable twist-off (TO) cap for glass bottles and jars

thingiverse

This is a fully customizable twist-off cap or lid of the type commonly used for glass bottles and jars. On the bottle, there are several threads (usually four or six), while the lid is cylindrical, with several "teeth" protruding inside. Twist-off caps are standardized and come in a fixed set of diameters called TO xx for a cap with xx mm diameter, such as TO 48 for the 48 mm lids commonly used for dairy bottles. Common diameters include 38, 43, 48, 53, 58, 63, 66, 70, 77, 82, 89, 100 and 110 mm. The base diameter of the lid needs to pass over the threads on the bottle or jar, so when measuring your bottle, make sure to include the threads in the measurement. The teeth, as well as the threads, are usually around 2mm deep. Caps up to and including TO 70 have four teeth, while caps starting at TO 77 and upwards have six teeth. As for the height of the cap, there are ordinary and "deep" caps, where ordinary caps are around 9 mm, and deep caps are around 13 or 18 mm. The model is fully parametric and customizable. The item entry contains some sample caps that can be adjusted to suit your needs. You can adjust the base geometry of the cap, add serrated ridges around the edge for a better grip (set the ridge depth to zero for a plain lid), and put up to three lines of user-defined text on the cap. Leave the text empty if you don't want any. Customize the design here or download OpenSCAD and make the adjustments there, then render and export an STL. This twist-off cap is useful as a starting point for designing anything around a glass bottle or jar, such as piggy banks, planters, enclosures, and so on.