Making a artificer but have some questions on magic items

So most of these questions have to do with the common item selection and how those items work

1. Staff of adornment, "If you place an object weighing no more than 1 pound (such as a shard of crystal, an egg, or a stone) above the tip of the staff while holding it, the object floats an inch from the staff's tip and remains there until it is removed or until the staff is no longer in your possession. The staff can have up to three such objects floating over its tip at any iven time. While holding the staff, you can make one or more of the objects slowly spin or turn in place." What is meant by until it is removed like do I have to remove it or any force that pulls it away and if it's any force how strong would it have to be. This is important for two of my ideas the first is the staff blender where I just put knives on the the end then wave it around while they rotate (slowly) the other is the broken object floating like if glass was levitating and then it shatters into pieces do all the pieces stay floating and if I float a bottle would the liquid stay floating

2 thermal cube a cube that can keep a space within 15 feet of it at 95 degrees fahrenheit in order for this to work the cube would have to be 1000+ degrees itself... So can I mage hand it into enemies to burn them to death taking 10 damage ( how much you take for touching a magma elemental)

3. Death by bead of refreshment it turns a pint of liquid into fresh water so what happens if you eat one or if even a small part of the bead was in your blood

4. Repeating shot what does this do with a sling like do I pick what it appears as in the sling like what if my sling shot diamonds or tungsten cubes also whats considered ammunition and a ranged weapon like I can shoot spit wads out of a straw or fling peas from a spoon can I get infinite ammo for that