I used one of these for the first time last weekend and found it surprisingly good. It is about 10l in volume and at about 26g is much lighter than the old one. It comes in very handy when creek access is difficult so you don't have to make as many trips, often in the dark.
Because of the lightweight material it wont stand up by itself so has to be hung from a suitable branch but that makes pouring easy from a standing height. To my surprise there is no leakage. These things have come along way. My old PP japara bucket which would empty out through leakage over night.
K.