▁Oak land ▁while ▁water ▁int ake ▁increased ▁by ▁ 6 3 % ▁in ▁Ber keley ▁and ▁ 1 9 % ▁in ▁the ▁two ▁neighbor ing ▁cities . ▁ ▁A ▁ 2 0 1 7 ▁before ▁and ▁after ▁study ▁has ▁concluded ▁that ▁one ▁year ▁after ▁the ▁tax ▁was ▁introduced ▁in ▁Ber keley , ▁sug ary ▁drink ▁sales ▁decre ased ▁by ▁ 9 . 6 % ▁when ▁compared ▁to ▁a ▁scenario ▁where ▁the ▁tax ▁was ▁not ▁in ▁place . ▁This ▁same ▁study ▁was ▁also ▁able ▁to ▁show ▁that ▁overall ▁consumer ▁sp ending ▁did ▁not ▁increase , ▁contradict ing ▁the ▁argument ▁of ▁oppon ents ▁of ▁the ▁Sug ary ▁Dr ink ▁Tax . ▁ ▁Another ▁ 2 0 1 7 ▁study ▁results ▁were ▁that ▁purch ases ▁of ▁health ier ▁drink s ▁went ▁up ▁and ▁sales ▁of ▁sug ary ▁drink s ▁went ▁down , ▁without ▁overall ▁gro c ery ▁b ills ▁increasing ▁or ▁the ▁local ▁food ▁sector ▁losing ▁money . ▁ ▁A ▁ 2 0 1 9 ▁study ▁re lying ▁on ▁self - report ing ▁found ▁a ▁ 5 3 % ▁drop ▁in ▁consumption ▁in ▁low - in come ▁neighborhood s ▁after ▁three ▁years . ▁ ▁Philadelphia , ▁Pennsylvania ▁ ▁Democratic ▁Philadelphia ▁mayor ▁Jim ▁Ken ney ▁proposed ▁a ▁city wide ▁s oda ▁tax ▁that ▁would ▁raise ▁the ▁price ▁of ▁s oda ▁at ▁three ▁c ents ▁per ▁ ounce . ▁At ▁the ▁time , ▁it ▁was ▁the ▁biggest ▁s oda ▁tax ▁proposal ▁in ▁the ▁United ▁States . ▁Ken ney ▁promoted ▁using ▁tax ▁re venue ▁to ▁fund ▁universal ▁pre -