my order number 210981344759512, 12th August 2012.
I'm afraid these new models do not keep the pressure, they leak at the input hole(valve) and just do not hold the Fizz in, I have tried two out of a packet of 4 , the first on a bottle of lemonade (flat by the next day), the next one on an empty bottle so I could up end it on to a jug of water, and as suspected, it leaks bubbles from the little hole in the neck. very disappointed.