Universal Conical Cup Holder - GTCH
It is sturdy and self-leveling, designed specifically for 3D printing, and has undergone years of testing and improvement.

It can withstand years of daily use due to its materials, structure, and resistance to any impacts.
It fits many common travel mugs very well.

The tool-free clamp is suitable for rods with a diameter of 7/8" - 1-5/16" (22-33.5mm).

In addition to the robust design of plastic parts, GTCH also uses common 608 cartridge ball bearings and other metal hardware.

Please refer to the parts list on page 4 of the assembly drawing in CHA02D.pdf.

Although they are common, these are not off-the-shelf parts at Maker Supply, so you may need to purchase them yourself.

The GTCH hardware kit, consisting of 14 items, including rubber friction parts

Design features:
It can be placed on your bicycle, golf cart, stroller, walker, boat, motorcycle, scooter, beach buggy, barbecue lamp, and so on.
It is designed to be used for leisure cruising/commuting. When using it, you should close the lid and put it away when you stop to enjoy a drink.
It is suitable for most common paper, metal, glass, and plastic cone-shaped travel mugs, as well as some wine glasses.
And it can also be used as a spinning decompression gyroscope (!!)
It is also suitable for all Izer Designs 12-ounce tapered insulated sleeve models - please refer to the tapered insulated sleeve list in the Izer Designs LLC Etsy store, or search for it on Makerworld here: Taper Cozie.
The tool-free clamp is suitable for rods with a diameter of 7/8" – 1-5/16" (22-33.5mm).
 

Market reference: Comparison with RAM Level Cup products.

Use and Precautions:
When commuting by bicycle, I use GTCH with my take-out cup, with the lid well-sealed. The take-out cup was specially selected to ensure that it can be mostly placed in the cup holder, and the cup lid just exceeds the top of the cup holder. It's very stable. Some conical take-out cups, especially thicker thermoses, may not be very stable.
However, even if the cup is stable and fits well, I will press the top of the cup with my fingers when going through bumpy sections to minimize shaking and keep it in place, because bumps or jumps might cause your drink to spill.
Some movements may cause the yoke to rotate, resulting in the drink falling. You can tie rubber bands around the yoke and secure them to the clamp, which can limit the rotation and still allow self-balancing. You can also tie rubber bands on the drink cup and around the yoke to help secure it,... but in that case, in my opinion, it won't be possible to quickly take a sip and leave when the traffic light turns red.
According to the weight of the cup and the drink, when encountering major turbulence or other forces, the GTCH may rotate downward on the rod to help avoid overload situations.
Over-tightening the clamp may lead to a malfunction.
Please keep your fingers and other objects away from the area in front of the central yoke connection bolts to avoid being pinched when the bottom edge of the cup holder rotates
You use it at your own risk.
It's not a toy.
Not suitable for children.
Enjoy it to the fullest!