a biodegradable injection mouldable polymer composition including on a dry weight basis from 45 - 85 % w / w by weight of a starch and / or a modified high amylose starch , from 2 - 15 % w / w by weight of a water soluble polymer preferably selected from polyvinyl alcohol , polyvinyl acetate and copolymers of ethylene and vinyl alcohol which have a melting point compatible with the molten state of the starch components , and from 5 - 45 % w / w by weight of one or more polyol plasticizers having a molecular weight in the range of 50 - 6000 , more preferably 50 - 2500 , and still more preferably 100 - 400 and preferably selected from the group consisting of sorbitol , glycerol , maltitol , xylitol , mannitol , erythritol , polyglycerol , glycerol trioleate , tributyl citrate , acetyl tri - ethyl citrate , glyceryl triacetate , 2 , 2 , 4 - trimethyl - 1 , 3 - pentanediol diisobutyrate , polyethylene oxide , ethylene glycol , diethylene glycol or polyethylene glycol ; more preferably glycerol , maltitol , sorbitol , erythritol and xylitol . the composition is preferably substantially soluble in water .