650mL Locking Cap Flask
650mL Locking Cap Flask
Built to hit the volume sweet spot for many runs at 650mL in volume. The bottle features a locking cap so the nozzle does not leak due to pressure from the belt. Made by HydraPak®.
Size Guide_ 650mL Locking Cap Flask
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Lifetime warranty
Duty free to EU and Canada
Free returns in US
Built to hit the volume sweet spot for many runs at 650mL in volume. The bottle features a locking cap so the nozzle does not leak due to pressure from the belt. Made by HydraPak®.
- Locking cap keeps nozzle from leaking
- 650 mL
- Filter Top Compatible
- Locking cap keeps nozzle from leaking
- 650 mL
- Filter Top Compatible

- 5 stars: 48 (98%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 1 (2%)
- 1 star: 0 (0%)
Thinking about carrying these guys around as my daily water bottle I love them so much. Never leaks, fits great in the running belt, perfect volume for moderate length trail runs.
I’ve taken it this bottle on 50 mile runs and 5 mile runs and it fit the bill for both.
Great extra flasks that you can use with the vest or individually depending on distance. Love them
Great extra flasks that you can use with the vest or individually depending on distance. Love them
It really is perfectly sized and exceptionally secure.
Best bottle
650mL Locking Cap Flask
650mL Locking Cap Flask
Works really well with the shorts.
Been loving the 650ml locking flask. I need a little more fluid on my long runs so these are coming in extra handy. I usually carry 2 stacked in the back of a running vest or 1 in the LF 2L running belt. The locking feature is key to avoid leaks!
I love the size and locking system. very helpful and never a worry about leaking
Raide replaced a defective soft flask that came with my belt about 2 weeks ago. Their customer service is awesome and went above and beyond to help me out! Awesome to see companies like this still exist!
650mL Locking Cap Flask
650mL Locking Cap Flask
I can throw two or three of these in my vest and have very specific hydration that won’t spill on my other stuff!
This is the best lightweight flask to use on any of my adventures out in the backcountry or any other activity I might need it. The locking cap is essential as the other versions do not have it and that makes this product far superior. Raide does it again like they do with every product solving a problem and making my backcountry ski adventures even better.
Best idea and a long time coming.
Great fit and functionality. So cozy and easy to move in.
I love the idea and function of this cap, super nice it works on many otther common soft flasks as well.
650mL Locking Cap Flask
Love the bottles, great locking mechanism on the cap and the extra capacity is a life saver. They fit in both a raide belt, and the normal bottle pockets on a Salomon vest
Been looking for a nice locking cap for hydrabotles and this is it!
650mL Locking Cap Flask
Exactly as advertised. I own two and will often shove the 650ml bottles into the front flask sleeves on my Salomon running vest for a little more extra water storage on long/remote runs. Also good for ultras with big gaps in air stations
a treat!
Unmentioned bonus feature: the exposed parts of the compression system are a perfect spot to carry my anti-rabid dog batton.
The flask and cap are the usual HydraPak quality with the usual HydraPak warranty. All good things on both counts. As such, I fully expect to get several years of not-so-gentle use out of them.
More importantly, I'm just glad to see that Raide and a handful of other companies are bucking a longstanding trend by standardizing on flasks larger than 500ml. Indeed these 650ml flasks work just as well in my vests as they do in the LF 2L belt and the extra capacity is greatly appreciated.
Best cap for any belt. Brilliant idea, whoever thought of it. Bought two (2).
Perfect bottle. Really enjoy the locking cap!
Love the locking cap - critical addition!
650mL Locking Cap Flask
Love the locking cap! I can stash it in my sweet Raide running belt with confidence it will not leak.
The thing works, this doubled what my belt came with and I’m going farther.