Detergent Cap: The Anti-Drip SpoutHow a double wall keeps sticky soap inside the bottle

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Why it looks like that

Liquid laundry detergent bottles feature a complex nozzle design distinct from water or soda bottles. This component utilizes a 'drain-back' system with a double-walled spout and internal weeping holes. The architecture ensures that thick fluid captured by the cap flows back into the main reservoir rather than dripping down the exterior, solving the problem of viscous mess through simple gravity.