Business is business

This book is creator of need, as well to preserve food (cut in advance) in the fridge you have to put them in boxes VACUUM. And those famous boxes that store foods under vacuum (to prevent oxidation) are offered for sale by our dear France Guilain.
Anyway, by this little book (skinny) I have the impression that it seeks to sell us his boxes.
So far the gel packs to the "weight baths" as it was going boxes I find it super expensive, kind 50 euros 1st prize.

That's my opinion. You have to make a living!

PS: I have perhaps not been clear enough in my sales pitch, it's okay, I have nothing to sell!