This item is A Christmas gift so I really can''t comment on how well it works. But It feels like a quality item, and the seller shipped quickly.
like product , 100% I recomend
I ordered 2 of these, and am satisfied with both. The order arrived in 1week to the UK, amazing efficiency. I haven't needed to try them yet, after all, they are an emergency tool. Hopefully I will never need them, but who knows what the future holds? Very lightweight and more convenient than trying to carry 1500 litres of water! You can drink safely and directly from most water sources (not seawater unfortunately). A bottle of dirty water can be screwed on, and the contents purified directly through the straw. Peace of mind and practicality for this price? Excellent.