The throwing thing is always highly irritating, but I had this idea.....how about a little bottle, with a cap, in the shape and size of a bow tie? Fill it with water, tie your line around the middle of the bow tie, and chuck. To me the biggest problem is always finding a suitable rock to tie the line around, then watching the rock come loose from the line and disappear into undergrowth as the sun brings darkness to the forest. With this, problem solved and it weighs nothing. Bonus - if you put elastic around it, you can wear it to formal camping affairs.