Good hygiene is essential to keep your eyes healthy and contact lenses in good condition. Unfortunately, if you haven't got access to the right lens care solution, nothing else will do. Storage in water has been linked with contamination of lenses that can cause serious eye infections. It's better to dispose of the lenses than to get an eye infection! If you are likely to not have liquid solution available often, consider daily disposable or continuous wear lenses.
Please visit your eye doctor / optician for a consultation and discuss contact lens options.