Natural Bamboo Charcoal Water Filters (4 pack) Eco-Friendly Plastic Free

Boil for 10 mins in a pan of water to sterilise & allow to cool and dry. Biodegradable bamboo charcoal water filters. Suitable for a 1 litre jug of water. Place in a jug and fill with tap water (charcoal may float when new but it will tend to sink after a week or so of use).