Ruby Wedding Anniversary Gifts

They are planning an Alaskan cruise in August to celebrate, then maybe something related to that? I tried to help them pay or take care of the cruise or a flight and they would not let us do that!

How to match the rings Ruby?

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What a beautiful vase Ruby color of their favorite flowers sent to their cabin on the cruise ship?

As they are planning a trip, why not buy them a digital camera brand new for them to register their journey and something to remember later.

buy them a camera so you can save the trip or arrange a meal with the captain on the ship all paid by you champagne etc.

You can plan a family celebration for their return using the destination they are going to be a theme for the party, EMI course they love the whole family with a toast to their happiness.

Several cruise lines offer special packages for birthdays and other occasions. Perhaps you might know if one of them is available for your parents cruising and offer a gift.
If this is perhaps not available, you could offer to improve the car or to provide some extras for their trip.