The WAVE TOOLS logo was designed as a rainbow in 1970, with the promise from Our Lord and Savior that God will never flood the earth to destroy all flesh again.

Genesis 9:13-17

 

New King James Version
 I set My rainbow in the cloud, and it shall be for the sign of the covenant between Me and the earth. 14 It shall be, when I bring a cloud over the earth, that the rainbow shall be seen in the cloud; 15 and I will remember My covenant which is between Me and you and every living creature of all flesh; the waters shall never again become a flood to destroy all flesh. 16 The rainbow shall be in the cloud, and I will look on it to remember the everlasting covenant between God and every living creature of all flesh that is on the earth.” 17 And God said to Noah, “This is the sign of the covenant which I have established between Me and all flesh that is on the earth.”