Dampit Humidifier for Viola Used for about 2 years. The sponge has bunched up, and there are no sponges in about 6-7 holes, but I think it can still humidify. Please refer to the photos. Please purchase only if you understand and agree to the condition. Will be shipped via standard mail. ==================== Dampit is a humidifier that protects your precious instrument from cracking due to dryness, and is an essential item, especially in winter. Dampit is ideal for viola humidity control. - Brand: Dampit - Model: Dampit Violin Humidifier - How to use: Used for instrument humidity control - Country of manufacture: USA