Lighters Hazardous Waste Discard When Empty Dispose of non-refillable lighters in the garbage when they are completely out of lighter fluid. If a lighter containing lighter fluid needs to be thrown out it should be treated as hazardous waste. Never Pour Down Sink Lighter fluid should never be poured down the sink. Doing so could contaminate drinking water sources. Learn how to dispose of lighter fluid. Rechargeable Lighters Are E-Waste Rechargeable lighters are electronic, so they must be disposed of with e-waste. Ways to Reduce Use Matches Matches are an inexpensive and environmentally friendly alternative to disposable lighters. Try Refillable Lighters Refillable and rechargeable lighters are a great way to reduce waste, especially for people who use lighters frequently.