Hi Kim, I’ve just had a look at the instruction manual, and you definitely can use both pots at the same time by stacking them. It’s actually really handy when you want to save time by simultaneously cooking a main and a side for dinner.

Hi Chris, what happens after 8 hours? Does the food start going off?

Whilst we haven't had any comments regarding spilling, the pot lid is not vacuum sealed and given all the variables involved, there is a chance some spillage may occur.

Yes you can get spillage. You do need to hear it and then let the vacuum seal form (about 10 mins) then we put it in a bucket inside its bag, an wrapped in a towel when 4 wheel driving. It does still work and not too messy.

We have used it successfully on an induction stove for the initial boiling stage of cooking.