This
is an interesting device.
One part of me wants to point out that for emergency self defence use a
standard bottle cap will be more than adequate. The “sip-nipple” type caps will
concentrate the force on a smaller area.
On the other hand, this product does
raise the user’s awareness that a bottle
in hand can be used for defensive purposes against an aggressor. There is also
a nagging part of my mind that insists this thing might be adaptable to
applications other than just on bottles.
I
see quite a few joggers carrying bottles such as these.
The
hand grip and the fact that they tend to be carried in hand rather than worn on
a belt gives them good defensive potential and I wonder how many joggers are
aware of this fact.
Even
without a fancy cap and design a bottle of water can be a good weapon. Water is
incompressible and has weight. A filled half litre bottle will add an extra
pound to your strike, which can be concentrated into the small hard area of the
cap using the Kongo techniques in my book. The surface of the bottle can fend
off a knife edge. It may damage the bottle but may buy you enough time to
escape. A bottle can also be used as a missile to distract a foe long enough to
counter attack or escape.