Waterlogic WL-3101 Firewall Hybrid Home Water Purifier Always pure; Firewall technology means every glass is as pure and tasty as the first Lightweight and mobile - at just 3.6 kg (7.9 lb.) you can use the Hybrid where you need it most No installation, no hassle - just plug it in, fill it and go Removable 1.5l (50 fl oz.) reservoir - BPA free, Biocote , fits into a standard refrigerator door Maintenance advice - the monitoring system tells you when it needs maintenance, so you can be sure that you will always have pure water