How do you safeguard them from guests putting things into them that don’t belong there?
Also, they tend to be germ magnets as housekeeping simply fails to sanitize them properly. So, how do you ensure there is no bacterial contamination of soap from the topping off of the dispensers?
I find the whole argument how single use bottles are destroying the environment, hypocritical at best, as passengers all over the world travel by car, train, and plane to catch their cruise. The better solution I propose are single use biodegradable toiletries instead of unsanitary bulk packaging.