I kind of have a mug question too. Is it worth it for us..........My son WOULD drink soda of our 7 day cruise, however, the 6 year old LOVES water, and that is pretty much all she drinks. Hubby and I are tea/water drinkers, but also want to try the different drinks that are offered at the bar. Is tea/ coffee free, or do we need mugs for that too? Any suggestions?????