How do you keep things that could be perishable? Well, one way is, of course, to buy a good sized refrigerator to keep your food frozen (like meat, fish and yes, ice cream) and fresh (fruits and vegetables). In the past, there was not really much option but to use salt to help preserve those perishable products such as food but this is just for s short period of time.
Well, how about other stuff such as medicine or cigars? Some medicines are just really kept in a storage area with the desired temperature; some are kept in the refrigerator, too. But as for cigars, one has to keep them in a cigar humidor. This helps preserve your cigars until they are used.