Articles of Faith, pg. 159; “Soon after the Church had been organized in the present dispensation, the Prophet Joseph Smith was about to purchase wine for sacramental purposes, when a messenger from God met him and delivered the following instructions: “For, behold, I say unto you, that it mattereth not what ye shall eat or what ye shall drink when ye partake of the sacrament, if it so be that ye do it with an eye single to my glory—remembering unto the Father my body which was laid down for you, and my blood which was shed for the remission of your sins. Wherefore, a commandment I give unto you, that you shall not purchase wine neither strong drink of your enemies; Wherefore, you shall partake of none except it is made new among you; yea, in this my Father’s kingdom which shall be built up on the earth.” Upon this authority, the Latter-day Saints administer water in their sacramental service, in preference to wine.”
Matt. 26:26-28; “And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body. 27 And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it; 28 For this is my blood of the new testament, which is shed for many for the remission of sins.”
Mormons use wonder bread and water for their sacramental elements. Their bread contains leaven, a symbol of sin and the water is not a symbol of the shed blood of Christ.