Single wall tumbler in 65% PLA corn and 35% wheat straw with bamboo lid and cork grip. Capacity 420ml. PLA (poly-lactic acid) is an 100% bio-based alternative for conventional plastics. It is made from fermented plant starch which is free of toxics and carbon neutral. Cork is a natural material, due to its structural nature and surface porosity the final print result per item may have deviations.