Hi everyone, sorry, I've been away so missed this. Also to France and mainly very hot. Desang is my company and I design the kitbags. They are not set up to keep insulin cool. The Slim will not fit in a Frio. Keeping insulin in Frios is a good idea for travel, as is the old insulin-in-a-flask idea. The problem with adding in something to keep insulin cool is simply one of bulk. The Slim, as the name suggests, is a smallish carry case so pretty much only fits in one insulin pen, a blood test kit and associated finger-pricker, tub of sensors as well as spare insulin cartridge and pen needles. The Slim is not designed for two pens! The kitbags are also leather, which does not lend itself to cooling products, as they can 'sweat' and lead to staining.
For short bursts of travel, like taking a plane to get to your destination, then you may not need to keep your insulin cool. So long as you are not massively over-heated, then nor is your insulin. Once you get there, keep spare cartridges and insulin bottles in the fridge.
There is also a range of bags called Medicool -- you can get them from Arctic Medical or from Amazon. These include a gel pack that you freeze and keep in the bags to keep insulin cool.
Beyond sensible measures, most 'normal' care would be sufficient. Don't keep insulin in direct sun, or leave spares in the glove compartment of a car.... While you can deactivate insulin by overheating (or freezing), I don't think it should be necessary to keep currently-in-use insulin in the fridge. Good luck with it all everyone! Sue