I agree with your points. And thank you for your kind words.

what do you think of the following explanations then.....?

Lust is described as being compelled by a burning desire that consumes you.
Physical representation of lust I imagined, would be a very syrup-like liquid.
Lust would be packaged in a vase, which are more shapely and provocative than a bottle.
The top of the vase would be open not sealed as lust can be spilled if not cared for.
Lust would take on the female form, with sexy curves, often associated with this sin.
The liquid acts as a dress; the more lust used, the more ‘skin’ is exposed.

Envy is the desire for others’ traits, status, abilities or situation.
Eyes are used to represent the looking and wanting of others’ good fortune.
Envy, despite being an overwhelming emotion, is portrayed as a small item of packaging, as the person often tries to hide the envious feelings behind a facade.
The packaging is a smooth squashed sphere shape, seemingly innocent until it is cracked open and an overwhelming sin leaks through.

Greed is, like lust and gluttony, a sin of excess. However, greed is applied to the acquisition of wealth in particular.
Lots of hands reaching out, grabbing at whatever they can get, represent the need for more regardless of what they already have.
The sphere can grow, the more money it contains.
The money represents the wealth of the sinful individual.

Wrath is the only sin not necessarily associated with selfishness or self-interest, but is the inordinate and uncontrolled feelings of hatred and anger.
The large spiked orb represents fiery anger that is dangerous and ready to explode.
The ball and chain symbolise that the person when consumed with wrath, is tied down by this emotion until it has gone. Anger is manifested in the individual who spurns for love and chooses fury instead. It is not possible to get through the wrath’s shell until it explodes.

Gluttony is described as the over-indulgence and the over-consumption of anything to the point of waste.
The stomach is often associated with over-eating, and therefore there is more than one of them, where the food goes through the last gets more and more full.
The funnel is used to represent the large quantity of whatever is being indulged, and the never ending supply of this food.

Oh and congrats on guessing them correctly