I don't like mixing my lye solution in a #2 because the plastic softens up. It does not melt, but it is difficult to have it hold its shape when trying to stir. #5 seems to not deform as badly.
cmzaha said:I agree about the #2 HDPE, especially when I mix 1.5 gallons at a time. It will get very hot so it is in the sink with a water/ice bath
Me three. My #5 is much more sturdy than #2 when it comes to mixing my solution. But the #2 is perfectly fine for storage when the solution has cooled.
IrishLass