Copper Foil Tape with Conductive Adhesive can be an interesting addition to your toolbox. The tape itself is made of thin pure copper so it’s extremely flexible and can take on nearly any shape. You can easily solder to it, and the tape itself can carry current just like a wire. On the back is an electrically conductive adhesive. The adhesive can't carry significant current but it is very handy for sensing applications where you don't want to solder the copper tape.
Copper Foil Tape with Conductive Adhesive comes in a roll 15 meters long, this tape is 0.07mm thick, 6mm wide and has conductive adhesive on one side and a protective paper backing over the adhesive.