Commercial gas masks are very expensive and out of reach of many people. Whilst I don’t believe that this DIY gas mask provides the same level of protection as a commercial gas mask, it is a great alternative that will protect from particulates (which includes tear-gas!), if you cannot afford a commercial mask, or you are in an emergency situation and none are available.
This soda bottle gas mask is very cheap and very easy to make. Seriously, you could make one in five minutes. All you need is a two liter soda bottle, some duct tape and a n95 rated face mask (either medical or DIY will do). N95 masks won’t provide much protection from true gasses, but they do provide protection from particulates and tear-gas,which is actually a dust and not a gas at all.
You can see how to make this DIY gas mask from the images above, but if you’d like more detailed instructions, head over to Instructables and check out the tutorial with step by step photos.
(Photos from: frenzy via Instructables )