Extreme symbolism makes the Lord's Supper mechanical, leaves no room for interaction with the Holy Spirit. This tends to make receiving the elements repetitious or on the other hand becomes so out of touch with the partaker that it is meaningless.
What I'm trying to say is, as Christians (with the Holy Spirit living inside) when we purpose in our heart to partake of the Lord's Supper it should be personal, meaningful and symbolic. If it is presented in a box there is no room for interpersonal interaction.