Reusable Water Bottles
Most hostels have bottled water for sale and this naturally produces a lot of plastic waste. The best way to avoid this is to either invest in a ceramic filter or a water cooler. Make up for the loss of your profits from selling bottled water by selling reusable drinking bottles, even with your own personal design as a souvenir. One suggestion to make sure you sell enough bottles can be that if your guests buy their own bottle from you, then refilling water is free.