Furniture with special countertops, corrosion-resistant faucets for water, sinks, and under-counter cabinets for storage. Can be integrated into modular linear island compositions, separating the laboratory washing area. Depending on the size, the washing units can be equipped with one or two sinks, and with one or more water or ultrapure water faucets for glassware washing or water supply to various laboratory equipment. Optionally, the countertop where the sinks are incorporated can have a superimposed anti-drip edge profile. Both at the back, the wall and the sides, the furniture can be equipped with splash-proof panels.