– Portable Oxygen Canister with Integral Mask, 99.5% Pure Breathing Oxygen, Two 18-Litre Doses Total 36 litres, Pack of 2, Lightweight Aluminium, Made in The UK

Seems fine so far. As other people have mentioned, they do feel light / empty when you hold them, but they are still dispensing.

Easy to use, instant shot of oxygen, very handy if you find you are in need of oxygen. Easy to store.

They seemed to work at first but maybe the valve was broken (on both) as they went empty ridiculously quickly.

integral mask does not work. Doesn't fit iteslf to the cannister correctly and as soon as you press down the lever the top lifts off the cannister ensuring no oxygen is released. very bad design

Handy size, easy to use but the face mask, I found to be rather uncomfortable. May just be me being used to the softer type oxygen mask.

These cans will soon empty if you depress the lever fully. They release the oxygen full blast, way faster than you can breathe in, so most of it is wasted. The trick is to depress the lever very gently to release the oxygen at a slower rate, one that will allow you to get the oxygen at a more breathable rate. Even then they don't last long. Not very cost effective.

Excellent

I know this isn't supposed to be for medical use, but sometimes one just has to cope whilst waiting for an appointment. This stuff has been great when my inhalers just can't cut it. A quick squirt gets me over the worst. The product is quite large but as light as a feather and is easy and obvious to use. Totally brilliant.