Check out this great upcycling project posted on Cults3d by Lebfab Shop. A simple to use handle that can be attached to used jars turning them into cups.
The website the handles are posted on is for 3D printing enthusiast to share their designs, which means that if you have a 3D printer you can download the specs for the handle and print it yourself at home.
We’ve looked at 3D printed kitchen appliances before at FDL but as the technology becomes more accessible, mainly thanks to reduced costs, more and more ideas are emerging from an online community happy to share their creations.
You can download the specs for the handle here - all you need now is the printer.