How to start a fire with a water bottle

[Twitchy]

https://www.youtube.com/watch?v=QwQJ-3pZfwc

Anyone willing to give this a try? They use a water bottle (clear) to focus the sunlight to start a fire!

[Socalman]

I have seen it done, you are using the bottle and water like a lens to focus the sun's rays, sort of like a magnifying glass. However it took a LONG time and the tinder was very dry. I would hope to have a better source of fire, but it is something that can be done.

[Sniper-T]

I have done it.. but like said... takes time. shitloads of time.... Anyone who fried ants as a kid with a magnifying glass, would be on board...

[Socalman]

I once saw on Dual Survival an episode where one of them took a plastic snadwich baggie they found and used urine the same way, as a lens to focus the sunlight. Just sayin'.