<p>Just a reminder, that tossing one’s cookies in public on a cruise ship may be a bad idea because of Norovirus and other such maladies :-). So, duplicate the experiment on balcony staterooms only…</p>
<p>Also, try Cunard (they’re not THAT expensive depending on time of year) since their ships are about the only non-bathtub deeper keel designs that are more ‘stable’. The typical Princess/Royal Caribbean/EtCetera has very little ship below the water line so stabilizers or not, it will shake, rattle, and roll.</p>
<p>Being lower in the ship does help. Princess had the bright idea to put a specialty restaurant on Deck 18, which moves quite a bit regardless. Not a good idea if you’re prone to sea sickness. Center of ship, lower levels would work the best.</p>