My joints vary, depending on how tight their rolled and the quality of weed. With dank, I can usually get a joint going for a good 10-15 minutes, but if it's mids and thier kinda dry, they usually don't last more than 10 minutes.

I think it's all in how you roll and the quality of weed that will determine how long your joint will last, an although I've never heard of a joint lasting for 45 minutes, LIP might have just found the right combination to get joints to last that long.