One was found between 7:00 and 8:00 a.m. by a woman walking her dog. A passerby found the second bomb.
Both were recovered without incident. The bottles contained a white substance and a liquid.
They are similar to other devices that have been found in Warminster in recent weeks.
"The frustration level is high. Very, very high," said Acting Superintendent Sandy Homel. "This is a very wonderful neighborhood and this has been disruptive to their lives."
The incident was unnerving for parents and school officials. In June, /*Susan Romanysczn*/ was convicted on 11 counts of making terroristic threats last October at Warminster's Longstreth Elementary School. Officials said she was angered over her 4th grade teaching assignment.
Romanysczn, who suffers from cancer, is under house arrest and will be sentenced next month.
Friday's events conjured up bad memories for parents.
"I have two boys, one's in third grade and one's in kindergarten, and I thought 'Here we go again,'" said Melanie Moffatt.
Police say this may have been a prank, but it's not being taken lightly. It could have been dangerous, and it was definitely disruptive. It also caused children to lose a full day of school.
Click here to get the latest Philadelphia news and headlines from across the Delaware and Lehigh valleys.