How do you take care of your Insulin when your away from home for long periods of tim

How do you take care of your Insulin when your away from home for long periods of time? How do you look after spare Insulin viles for example? I always use a frio bag but I find it is to big and takes up too much room, it always leeks, its not very secure and my spare Insulin viles could be stolen easily and I get worried my viles will get crushed becasue its not very rigid. What are other people like?
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