Lighters Special Instructions Discard When Empty Dispose of non-refillable lighters in trash when they are completely out of lighter fluid. If a lighter containing lighter fluid needs to be thrown out it should be treated as household hazardous waste. Never Pour Down Sink Lighter fluid should never be poured down the sink. Doing so could contaminate drinking water sources. 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.