Moistens and seals envelopes in one simple pass.No more licking and hand-sealing envelopes.Easy-fill top reservoir.Enclosed housing prevents splashing and protects water supply from evaporation.Accommodates most envelope sizes.Moistens and seals envelopes in one simple pass. No more licking and hand-sealing envelopes. Easy-fill top access reservoir. Accommodates most envelope sizes. Enclosed housing prevents splashing and protects water supply from evaporation.