I have no idea how British people pronounce it, I don't believe I've ever discussed water bottles with a British person. I jut saw the meme and was reminded of another meme I'd once seen.
It is. The meme has four glottel stops, this has three. The meme has the "el" removed, this doesn't. Weirdly, the meme has the "o" sound removed for for "of" as well.
It's an entirely fictitious way of pronouncing something, it equates a very, very small subset of the country with "Britain" and is a great example of "fake American British accent" becoming the "norm" to the extent where British voice actors are training to put on voices to sound "more British" (such as Tracer in Overwatch).
The meme might as well say "burdle der wurder" and claim it's how American's say it - kinda close, but also really far 🤷
