We can’t say exactly how long Sinchies last as everyone uses them for different things and take care of them in different ways. We have had some customers using the same batch for years and some only for six months as they’ve constantly been heating the pouches, freezing them and washing them in the dishwasher (please note, we do not recommend putting pouches through the dishwasher). Generally we say six months is a good life, due to the low price point of the pouches.