Board Thread:General Discussion/@comment-166.137.88.23-20130610185107/@comment-94.192.168.247-20130615233858

it is 100% liquid. from the snake on his belt to the jackel teeth around his neck, alongisde the fitting quote. not only this but eli is a biblical reference with david and eli being brothers, also referencing solid snakes real name. also eli and david has 6 other siblings, and this references les enfantes terribles where there were originally 8 clones, but only solid and liquid survived.

id say thats enough evidence.