I admit, duct tape has its place. Its cheap, easy to find in local stores, is pretty wide so it covers a big surface, and has the strength to go a long ways.
But, if you've hiked much, you'll find bits of it on the trail cause it gave up. It leaves a sticky residue which collects dirt.
So, I've been using electrical tape. Strong, cheap, kinda narrow, and easy to find in local stores. Doesn't give up in the rain. Haven't had any problems with sticky residue.
Just my take on it. Try it and tell me what you think. I wrap some around my water bottles and carry it that way. Weighs nearly nothing.