disposable freezer 'blocks' (Broadstone BH18)

These are basically plastic bags full of water (some in paper bags) that you freeze then use to keep your cool-box cold, but if you don't want to carry the weight home you can cut them open and drain the water. There are about 16, some in the paper envelope some not. Please say how many you want and when you can collect. I will not be responding to anyone who only asks if they are still available.