REI is having a sale right now for 20% off of any regular priced item if you are a member of REI. You can get a lifetime membership for $20. I'd never heard of Yeti products, but with all the Yeti love in here, this sale seems like a good time to try it out - the can koozie will make a great stocking stuffer.
My dad's an elderly slug who doesn't really have interests. Last year I sent him Star Trek pajamas and he got real surly with me. For his birthday, I sent meat. He loved it. He's getting meat and cheese this year. I sent the Beef Wellingtons because restaurants don't make that anymore.