"No instruction in French, but in Japanese ... But this is not a concern in the French guidance on the carton enough. The product widely like 7 am hot condition put water well hot in the aluminum part for at least 3 minutes and keep the lunch box in his soft case for it is all that contributed to last long warm little trick:.. if you do not use the smallest box in the so-called hot part. You can put hot water and you still gain 2 hours in duration ... more Horizontal stored just like 5h (warm meals), vertical: 8 (the meal being very hot) I really regret the few euros more in this model and that mark. Really top quality. "
