How to make fake milk?
Elmers glue and water.
Get the water boiling in a medium size pot. Remove from heat.
Add 1 medium bottle of glue to the water and stir till totally
disolved. Allow to cool. If too transluscent, gently warm the water
and add more glue slowly till it satisfies your preference.
This is how they film milk for TV and print, as natural milk
appears slightly blue-ish on film.
If making a baby bottle -- seal the ring cap with elmers glue
after pouring the fake milk in, don't forget to seal the cap also.
I use E 6000 glue.
If you wish to see the milk travel to the nipple then buy a
silicone blind nipple(no hole). Be sure to seal the cap.