Conclusions

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The Nalgene container with the foam liner will keep aerosols from escaping and will contain the liquid pepper derivative. The propellant will discharge from the container but will not incapacitate any operator. The Nalgene container with a foam insert is a simple and inexpensive solution to the problem of transporting bear repellent spray canisters. This is the MTDC-recommended safety container. Appendix B includes a drawing of this container.

The PVC safety container will keep inadvertently released aerosols from escaping and potentially incapacitating an operator. An air valve should be incorporated in the design. The valve allows pressure to be relieved after changes in elevation, making it easier to open the container. This container will totally contain the pepper spray and propellant, but will be more costly to manufacture than the recommended Nalgene container. Appendix A includes a drawing of this container.

Adding a filter would remove the irritating aerosols, but would add cost and complexity. The filter is not a recommended alternative.