I love my waterbed!! I can set the temperature a touch lower than normal so I stay cool and don’t overheat and it is so flexible it cradles me! I have mine what the waterbed guys think of as a little bit under-filled so it’s more “cradling”. It’s unusual but fantastically comfortable.
And I have cups with handles and lids and straws so that when I tip them over (I always tip them over!) they don’t spill so much.