Dufite uburambe bw'imyaka irenga 15 mu kohereza mu mahanga, twibanda ku gupfunyika ibiryo bishobora kubora kandi bigatunganywa n'ifumbire mvaruganda bikozwe mu bisheke, ibinyampeke by'ingano, n'ibinyampeke by'ingano, dufite ibyemezo nka FDA, OK COMPOST, DIN EN13432, na BRCS.