I bought these glass cup with lids from Amazon and as you may know the wood lids tend to get moldy. My fiance loves to use the glasses and I found a bunch of lids on Makerworld and other places but none of them worked out very well, either the lid was too big or small or none of the gaskets would fit right. So I made this one myself. Now, everything fits just right. If you have the DWTS glasses from Amazon, the gaskets will fit for the 3D printed lid. I haven't figured out how to make the gaskets yet, but once I do I will add them to this post.