Bests & Worsts Reviews from Amazon

I ended up purchasing both an Ultralight and Geopress from Amazon with the intention of using the bottles on the Otter Trail Hike in South Africa from 14 November 2019 to 18 November 2019 and on future travels. The filters worked fine on day 1 and day 2 of the hike, but by the 3rd day they were almost impossible to press. By the 3rd day we had to resort to sitting on the bottles to use our full body weight to get any water through and by the 5th day the bottles were useless and we were forced to drink unfiltered water. I was excited about the Grayl products but I was so disappointed to find out that both filters failed after filtering less than 10 liters of only slightly tinted water. This is well below the claimed volume of 250L and 350L for each product. I understand that Grayl says that only the clearest water should be used to ensure that the lifespan of the filters are reached. I therefore made every effort to filter only clear water. Most of the 10L of water that we filtered was the water that the National Park recommended for drinking purposes so it was by no means dirty at all. I spent a lot of money on these products with the intention of using them on future travels and with the intention of filtering the claimed volume to make my purchase worth the money I spent. After filtering less than 10L of only slightly tinted drinkable water, I now have two completely useless bottles that I am unable to use. I have no faith in purchasing filter replacements because of my experience on the hike. I request that Grayl refunds the cost $224.49 that I have incurred as the products have severely under-performed and are now useless to me. Please see the attached images of my negative experience.