We are using the Credo ProMed line rather than the ones that look like the Igloo cooler. The ProMed inserts for the smaller coolers are cubes w/ a lid (TIC). The outer nylon shell has a vacuum sealed dense foam insert w/ lid that the TIC fits into. The entire TIC goes in the refrig for the red cell transporter. The entire cube for the Plt transporter sits on a shelf at room temp (monitored). We also have large coolers in the ProMed line that have individual liquid filled 'slabs' that build the TIC cube in the cooler (separate pieces for 4 sides, top and bottom).
We chose the ProMed line because the nylon shells have shoulder straps plus a short strap over the lid to make carrying them easier. We send quite a lot of blood product across our campus to a cancer center and wanted to find something that would work well for them. They are also OK for the ED and MTPs on the floors. That nylon outer shell would not work well for surgery - can't be cleaned as well/easily as a hard shell on the Igloo type. (We don't send blood products to the OR in coolers.) I suspect the Credo igloo type cooler would hold temp well. It looks like they have an insert similar to the ProMed line, but we haven't tried one of theirs. Our Igloo types were not Credos.
Replacement inserts are available. The vacuum sealed inserts have an expiration date, so they must be replaced every 4 (?) years. We ordered ours from Pelican BioThermal. I clicked on the 'contact us' button on their website and someone in sales got back to me with the information I needed. Credo coolers are expensive. I believe that the small one (holds 2 RC) cost us over $400 in 2017. We ordered an extra TIC for each cooler, so once we get a cooler back from the cancer center we can sanitize the cooler, swap TICs and send out blood for another patient. The nylon shells are still holding up very well and I haven't yet needed to replace a TIC or insert because of damage or temp failures.
If/when I add more coolers, I am going to look at MaxQ. They prices have been lower than Credo in the past. I've been in contact with their sales people directly. They are coming out with some combo coolers that look great for MTPs - wheels and a separate platelet pouch. They have a very basic cooler that we might use when we transfer red cells with patients that was less than $200 when I priced it last. If one of those didn't make its way home we wouldn't be out as much money as if we lost a Credo cooler. MaxQ coolers also have an exterior that would be easy to clean.