bloodymary

Hello - this is my first post from downunder - so I hope this topic is suitable! Last year I purchased and validated some small Willow coolers (6 can size) for up to 4 hour storage of 2 Red Cells - primarily for use in theatre. Recently however the coolers have started to fall apart and I can now see that there is definitely a design fault with the flip style lid. Can any of you suggest or recommend a robust replacement cooler to meet my requirements? Thanks Bloodymary