Abstract: A device is used to drain a viscous fluid from a substantially empty pouring container into a substantially full receiving container. The device contains a vertically-oriented funnel having an open wide top and an open narrow bottom, a top damping means connected to the funnel and adapted to clamp and hold a pouring container in an inverted position over and in vertical alignment with the funnel, and a bottom clamping means connected to the funnel and adapted to clamp and hold a receiving container in an upright position under and in vertical alignment with the funnel. When the top clamping means is clamped onto a substantially empty pouring container and the bottom clamping means is clamped onto a substantially full receiving container, a stable assembly is formed which can be left unattended for hours.