Water2 water filter starter pod 1.0 (St Albans AL3)

I ordered a replacement cartridge for my Water2 water filter and they accidentally sent me a starter kit. This pod attaches to the cold tap under the kitchen sink. I have used the cartridge but you can order a replacement cartridge from Water2 for £99 (https://water2.com/products/capsule-yearly?srsltid=AfmBOopV-gl73fgex4cazu6C...). They only need changing once a year so a great way to have healthy filtered water.