There are a few different types of Katadyn filters, and each has its own benefits. The best filter for you will depend on your specific needs.
The first type of filter is the Ceradyn Drip Filter. This filter is great for household use and can provide up to 99.9999% clean water. It's easy to use and doesn't require electricity or batteries, making it a great option for emergency situations.
The second type of filter is the Micropur MP1 Cartridge Filter. This filter is designed for personal use, and can provide up to 99.9% clean water. It's small and lightweight, making it perfect for backpacking or camping trips. It also doesn't require electricity or batteries, making it another great option for emergency situations.
Finally, the third type of filter is the Ultra Flow Water Filter System. This system is designed for large groups, and can provide up to 99% clean water. It's larger and more expensive than the other options, but it's worth the investment if you need to purify large amounts of water at once.