Hi! Since I love closure, I thought I would post what I ended up with:
https://www.walmart.com/ip/Igloo-28-...ooler/23735485.
I'm going to sound like FLL for a moment, but for $11 this thing is great! In the end, we realized we only needed a good enough cooler to last one whole day. This does so--at the end of 10-hour days on the boat, there is very little melted ice (10% maybe?). Of course, it is tucked behind my captain's chair (mostly in shade) and rarely opened, but matched with some $7 Ozark Trail insulated cups (those things ROCK), we get a whole day of freezing cold food and beverages.