▁four . ▁Pop - up ▁to aster s ▁can ▁have ▁a ▁range ▁of ▁appearances ▁beyond ▁just ▁a ▁square ▁box , ▁and ▁may ▁have ▁an ▁exterior ▁finish ▁of ▁chrome , ▁co pper , ▁br ushed ▁metal , ▁or ▁any ▁color ▁pl astic . ▁The ▁market ing ▁and ▁price ▁of ▁to aster s ▁may ▁not ▁be ▁an ▁indic ation ▁of ▁quality ▁for ▁producing ▁good ▁to ast . ▁A ▁typical ▁modern ▁two - slice ▁pop - up ▁to aster ▁can ▁draw ▁from ▁ 6 0 0 ▁to ▁ 1 2 0 0 ▁w att s . ▁ ▁Bey ond ▁the ▁basic ▁to ast ing ▁function , ▁some ▁pop - up ▁to aster s ▁offer ▁additional ▁features ▁such ▁as : ▁One - s ided ▁to ast ing , ▁which ▁some ▁people ▁prefer ▁when ▁to ast ing ▁bag els ▁The ▁ability ▁to ▁power ▁the ▁heat ▁elements ▁in ▁only ▁one ▁of ▁the ▁to aster ' s ▁several ▁sl ots ▁Sl ots ▁of ▁various ▁depth , ▁length , ▁and ▁width ▁to ▁accommod ate ▁a ▁variety ▁of ▁bread ▁types ▁Pro vis ions ▁to ▁allow ▁the ▁bread ▁to ▁be ▁lifted ▁higher ▁than ▁the ▁normal ▁raised ▁position , ▁so ▁to ast ▁that ▁has ▁shift ed ▁during ▁the ▁to ast ing ▁process ▁can ▁safely ▁and ▁easily ▁be ▁removed ▁ ▁To aster ▁o vens ▁ ▁To aster ▁o vens ▁are ▁essentially ▁small - scale ▁conventional ▁o vens ▁and ▁can ▁be ▁used ▁to ▁cook ▁food s ▁other ▁than ▁just ▁to ast ing . ▁A ▁front al ▁door ▁is ▁opened , ▁hor izont ally - orient ed