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Sealed/Unsealed Indicator

for thermoses and sport bottles.
 
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I've been carrying a Camel-Bak sport bottle with me to and from work every day for the past 2 months because I'm cutting back on my soda consumption. I've been drinking almost nothing but water this whole time, and have lost a lot of weight as a result.

The issue I'm attempting to resolve with this idea is the tendency of the lid of said sport bottle to become inadvertently loosened while twisting the spout open/closed, and dumping large amounts of the contents down my shirt when I attempt to take a sip. I don't believe I can the only person to have had this problem.

So my idea is for a line of sport bottle and Thermos-like products with lids that have pressure sensors on the underside, and either a spring- loaded pop-up post or an LED indicator that signals when it is screwed on all the way. The LED might be be better because it could be used to turn red when its not sealed, and green when it is. Not sure if there's a mechanical equivalent for that function. I'm not attached to either specific method, but the idea of any reliable indicator is what I'm going for.

21 Quest, Sep 14 2010

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       It might be best to use resources that already exist. For example, it already contains water, which can be used as a state-change medium. Surely there must be a way that it can, using its own resources, cause a change of state of the tactile sensory area of the users skin, for example, on the front of the chest, instigating a temperature sensitivity alteration. If there could be a way that it could transmit some of the liquid medium to the front part of the garment that you’re wearing, you’d have an immediate feeling on your skin that differs from the surrounding area — typically by making it feel cooler and more sensitive to the garment. But, of course, it should be arranged so that it could transmit the liquid medium only upon the condition that the lid seal is not fully closed. If it is closed, then the logic should prevent the transmission of the temperature-response state change medium.
Ian Tindale, Sep 15 2010
  

       [Ian] yes, but I wonder if your solution could deliver a proportionally stronger temperature-response signal depending on the variable integrity of the seal?
hippo, Sep 15 2010
  

       Man oh man... Ian, you have my vote, altered temperature sensitivity and all.
absterge, Sep 15 2010
  

       Ya know, I just *knew* someone was going to say that, Ian.
21 Quest, Sep 15 2010
  

       The sensor should also account for a cover that's screwed on really tightly at an angle.
  

       How about a valve system plus pressure sensor that detects whether the bottle can be pressurized?
subatomicsushi, Sep 16 2010
  

       I had thought about that, but would make the bottle too bulky.
21 Quest, Sep 17 2010
  

       But most of that technology can be offloaded into the accompanying battery trolley you’d pull along with it.
Ian Tindale, Sep 17 2010
  
      
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