A set of soft flasks for hiking or running, two of which have a filter that protects from 99.9% of bacteria and parasites. With these you can refill your water in the Hong Kong streams and drink worry-free. Used very few times.https://www.lifestraw.com/products/lifestraw-flex  Can be sold separately. Contact me for details.Self pick up in Cyberport (other location can be arranged)