1. Before use, fill bobble with water. 2. Squeeze full bobble of water through filter. Black dust will appear in first rinse. Don't worry, it's only carbon. 3. Refill bobble over and over again to enjoy better water. Save money. 4. Replace filter after 2 months or 40 gallons/150 litres. Tips to keeping your bobble beautiful: Regular long baths in warm, soapy water; dry well with a soft towel; avoid storing in direct sunlight, it's not good for bobble; show the filter some love too. Soak in boiling water, they like it hot.
Do not use where water is microbiologically unsafe or of unknown quality.