Good old eBay will tell you what they are worth, Ellen. I have seen lots of these listed in the casino category as "tiki mugs" or "tiki glasses". I don't think there's any particular history that goes with them from a gaming point of view. Just an interesting way to order a drink with an umbrella in it [g].

Both Harveys Tahoe and the Trader Dick's in Sparks have examples of these things out there.