Polish MP-5 Gas Mask Drinking Tube test

Testing the canteen and drinking tube system of the Polish MP-5 gas mask/respirator. This is a really weird drinking tube, quite similar to the Israeli drinking tube system but not properly compatible with it. The drinking tube works using gravity, like most masks but also requires some plastic levers to be depressed to allow the water to flow downwards and into the mask, holding the canteen and levers at once is a bit awkward but the flow rate is fine. I also tried using the canteen and tube system with t