I'm not familiar with the Paratrooper Water Filter.
I'd say, go with the time tested water filters of Katadyn or MSR if you can't find any information on the Paratrooper. It's worth the extra $30.00 for a quality product. Your family is worth it.
On the other hand, if you just don't have the cash and you're only planing for a few days, pick up a 20 count pack of Katadyn Micropur Purification Tablets. It'll get you 20 liters of water that won't make you sick. You'll have to replace them eventually because of the expiration date, but it could hold you over until you can find a filter that will fit your needs.