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Are those BTwin bladders from Decathlon any good? £9.99 v £26.99 for a Dakine one seems like a no brainer, on the surface at least.
I've had a couple of them, went in to buy a cleaning kit for my decent one and decided it was cheaper to buy a couple of spares and not bother cleaning them too much.
Both still in the kit bag years later. Not an issue. Not a huge fan of the valves on them but I guess you could swap your dakine over?
What's the filler opening like? It looks a bit fiddly from the photos.
It's fine, twist it open and fill it. I prefer it to my hydrapack one which has one of the slidey bar style on top ones.
Decathlon do two different styles: [url= http://www.decathlon.co.uk/500-2l-water-bladder-id_8300755.html ]Wide opening[/url] and [url= http://www.decathlon.co.uk/2l-tpu-water-backpack-hydration-bladder-id_8217347.html ]Screw cap[/url]