Essential item for any traveller to avoid contaminated water (e.g. brushing teeth, drinking water). Preserves water for up to 6 months by using silver ions. Use in combination with a filter in turbid water. Technology: Silver ions combined with chlorine. Contact Time: 30 min for bacteria and viruses, 2 h for Giardia in clear water. Form: Tablets. Shelf-life: 5 years. Application: Camping, travelling and hiking. Use biocide safely. Always read the label and product information before use.