Small insulated lunch bag

[Doncarlos]

I'm in need of a little lunch/snack bag that's insulated so I can take food out for my son on days out/holidays.

There's loads around but they're all too big. I use a Roka medium Canfield bag so I need something that will slip neatly into that. I really can't be doing with lugging around more than one bag.

Any suggestions?

I swear by the gorgeous Beau and Elliott ones https://www.beauandelliot.com/product-category/lunch-on-the-go/lunch-bags/ - there are a few different sizes and I normally just add it inside my tote