For the reasons stated above about the safety of plastic and water without extremes of heat, and due to the plastic funnel and filter cartridges, most manufacturers don't feel it's necessary. We're glad that Eco Bud did, as it provides options for those trying to reduce plastic. Glass will last you a lifetime, unless you break it, so the fragility of a glass jug has a bearing on manufacturing costs, packaging materials, transport and storage. Since most water filter jugs are low cost and sold in supermarkets and budget department stores, it's an easier sell to have a sturdy plastic jug than a glass one. The Eco Bud glass water filter jug is a welcome alternative in our store.