Photographers in need of portable tripod stabilization have a new option called WaterWeights. These balloon-like devices are made from PVC and weigh 139g / 0.3lb when in storage, expanding to a weight of up to 1.3kg when filled with water. A WaterWeight can slide down the length of a tripod to rest over its feet or can hang from its handle to keep gear stable. Read more
Articles: Digital Photography Review (dpreview.com)