The Platypus Big Zip LP has an improved Low Profile design that ensures that these generous hydration bladders do not take up more of your packs space than necessary. The Big Zip is an ideal choice whether you're running, cycling or walking where you will need constant access to water.
The Big Zip uses the Platypus SL closure, a Slide Lock closure system that seals the top closed containing the liquid. The advantage of this style of closure is that it allows for fast filing and provides a large opening for easy cleaning. The drink tube is connected via Platypus's quick connect system. This allows you to disconnect the bladder for easy filling leaving the tube in place on your pack.
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This bladder is excellent product and has served me well in my Lapland-hikes. I've found no faults in it. The Big Zip-system is very clever. There's been no problems at all. 3 Liter bag fits in my Deuter 75+10 l backpack perfectly. Valve-system works just fine and there's been no problems with locking system. Compared to bottle this bladder is so much more convenient. I still carry also 0,75 l Camelback bottle with me tho, just to be sure :)
I bought this hydration bladder for a fell walking holiday in the Lake District. After two weeks' daily use I can find no fault with it. The 2 litre volume is plenty for a long day walking on the fells. The sealing system works well and there were no leaks. The locking system on the mouth-piece also functioned very well and helped stop air bleeding back into the reservoir. The slim shape fitted easily into my backpack's hydration pack compartment and also helped keep the weight close to the body. Overall an excellent product, a bit expensive, but high quality.
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