Kuba Cup & Trader Vic mug: startling similarities

Whilst trolling on ebay I came across this:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=859535354&r=0&t=0&showTutorial=0&ed=1019577204&indexURL=0&rd=1
VERY similar to the Trader Vic black mug that they still make. (minus the 'knot' on the handle)
Kind of interesting, yah?