Waterproof, Large, Hydration packs for cycling?

Hello, Can anyone tell me a large Hydration pack which is waterproof and suitable for cycling. I am talking 25L plus capacity with 3L water reservoir. I know about the Ergon BC3 (but i need other options). http://www.dotbike.com/p/5523?utm_source=google&utm_medium=base&utm_campaign=FGL Any advice is... show more Hello,

Can anyone tell me a large Hydration pack which is waterproof and suitable for cycling. I am talking 25L plus capacity with 3L water reservoir.

I know about the Ergon BC3 (but i need other options). http://www.dotbike.com/p/5523?utm_source=google&utm_medium=base&utm_campaign=FGL

Any advice is appreciated, thank you.
Update: also if not available in the UK i would buy online from other countries.
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