The Hippo* can retain up to 2.5 litres of water with every flush.
The bag sits in the water underneath your cistern float. It is made from durable heavy gauge polyethylene and has a hole in it to allow water to circulate, preventing any stagnation.
The Save-a-flush* can help you save up to one litre of water with every flush.
The bag of crystals (made from a harmless silicone gell) sits in the bottom of your toilet cistern. The bag will swell up around six hours after installation.