Stack them up into a pyramid or nest them inside each other. This set has 11 graduating sized buckets in bright colours and designs. Stacking cups are a versatile activity, great for water play, in the sand pit or just for every-day. It develops sizing concepts with the ability to pile or nest in the graduating sizes.Made from Bio by Gowi. The Bio plastic material is made from sugarcane using leftover products of sugar industry to create biological polyethylen. Sugarcane is a renewable raw material. Recommended for 9 months - 2 years