Version two, a more secure attachment to the Prusament PETG clamp from my previous design. Using a slightly modified clamp frame to clamp onto a boss and held in place by clamping force. The clamp screw gets assembled through the upper handle hole for better retention. (Version one uses a stock Prusament PETG clamp - https://www.printables.com/model/316453-clamp-and-remote-holder)
Same disclaimer for food safety, please also adhere to food safety guidance to seal the mug prior to use.
Take your pick of three designs.
The author remixed this model.