目前(qian)市場上出(chu)現的(de)(de)(de)(de)(de)飲(yin)用(yong)(yong)水(shui)(shui)桶(tong)(tong)(tong)分(fen)為四類(lei)：食(shi)品級的(de)(de)(de)(de)(de)全新(xin)料PC(學名聚(ju)碳(tan)酸(suan)酯)桶(tong)(tong)(tong)、非食(shi)品級的(de)(de)(de)(de)(de)PC桶(tong)(tong)(tong)、PET(學名聚(ju)對(dui)苯二(er)(er)甲(jia)酸(suan)乙二(er)(er)醇(chun)酯)桶(tong)(tong)(tong)和用(yong)(yong)廢舊塑料、劣(lie)質廢料、廢棄(qi)光盤甚(shen)至(zhi)洋垃圾等(deng)制成(cheng)(cheng)的(de)(de)(de)(de)(de)黑(hei)桶(tong)(tong)(tong)。桶(tong)(tong)(tong)裝飲(yin)用(yong)(yong)水(shui)(shui)因其水(shui)(shui)質潔凈、衛生(sheng)、口感較好、保質期長、飲(yin)用(yong)(yong)方便(冷、熱飲(yin)均可)而備受(shou)消費者的(de)(de)(de)(de)(de)青睞，已成(cheng)(cheng)為眾多家庭的(de)(de)(de)(de)(de)飲(yin)品。水(shui)(shui)桶(tong)(tong)(tong)的(de)(de)(de)(de)(de)質量(liang)至(zhi)關(guan)重要，將直接影響飲(yin)用(yong)(yong)水(shui)(shui)的(de)(de)(de)(de)(de)質量(liang)。正(zheng)規的(de)(de)(de)(de)(de)生(sheng)產(chan)企(qi)業(ye)(ye)使用(yong)(yong)PC(聚(ju)碳(tan)酸(suan)酯)桶(tong)(tong)(tong)，這種桶(tong)(tong)(tong)耐(nai)磨耐(nai)高溫(wen)(wen)，符合(he)國家有(you)(you)關(guan)衛生(sheng)規范，但仍(reng)有(you)(you)一部分(fen)企(qi)業(ye)(ye)為降低成(cheng)(cheng)本，大(da)量(liang)使用(yong)(yong)PET(聚(ju)對(dui)苯二(er)(er)甲(jia)酸(suan)乙二(er)(er)醇(chun)酯)桶(tong)(tong)(tong)，這種桶(tong)(tong)(tong)在(zai)高溫(wen)(wen)下容易變(bian)形，有(you)(you)的(de)(de)(de)(de)(de)企(qi)業(ye)(ye)為防止PET桶(tong)(tong)(tong)變(bian)形，在(zai)PET桶(tong)(tong)(tong)二(er)(er)次使用(yong)(yong)時，便省略了高溫(wen)(wen)消毒這個環節(jie)，這一舉動給消費者造(zao)成(cheng)(cheng)了嚴重的(de)(de)(de)(de)(de)隱患。

　　國(guo)家(jia)質檢(jian)總局頒布的(de)相(xiang)關文件規定(ding)，PET飲用(yong)水桶(tong)(tong)不(bu)(bu)屬于食(shi)(shi)品用(yong)塑(su)料包(bao)裝、容(rong)器、工具等制品發(fa)證范(fan)圍，為(wei)此(ci)國(guo)家(jia)明令禁止循環使(shi)(shi)用(yong)的(de)桶(tong)(tong)裝水桶(tong)(tong)使(shi)(shi)用(yong)PET桶(tong)(tong)。據了(le)解，目(mu)(mu)前(qian)國(guo)內在(zai)PC桶(tong)(tong)方面并沒(mei)有(you)明確的(de)國(guo)家(jia)標準或行(xing)業(ye)標準。也(ye)(ye)沒(mei)有(you)不(bu)(bu)允許(xu)生產使(shi)(shi)用(yong)的(de)禁令，而廢舊飲用(yong)水桶(tong)(tong)回(hui)(hui)收利(li)用(yong)的(de)不(bu)(bu)利(li)也(ye)(ye)使(shi)(shi)整個行(xing)業(ye)存在(zai)隱(yin)患。目(mu)(mu)前(qian)對(dui)損壞、淘汰的(de)PC飲水桶(tong)(tong)尚沒(mei)有(you)特(te)別好的(de)回(hui)(hui)收再(zai)利(li)用(yong)措施，也(ye)(ye)沒(mei)有(you)限(xian)制其回(hui)(hui)收品再(zai)次被用(yong)于食(shi)(shi)品包(bao)裝容(rong)器中的(de)相(xiang)關政策和法(fa)規。

　　由(you)于PET材質(zhi)(zhi)(zhi)不(bu)(bu)耐高溫(wen)，長(chang)期反復(fu)使用(yong)以后，一些有(you)(you)機(ji)物質(zhi)(zhi)(zhi)殘留的(de)(de)單體(ti)會溶解到水中，對(dui)人體(ti)造成一定危害，國家已(yi)明令禁止使用(yong)。同(tong)時(shi)提醒消費者在區別PC桶(tong)和(he)PET桶(tong)時(shi)要注意：PC桶(tong)比(bi)較(jiao)(jiao)硬，手(shou)按不(bu)(bu)動，看(kan)上去(qu)外觀和(he)紋路比(bi)較(jiao)(jiao)透明和(he)清楚(chu)，桶(tong)的(de)(de)底部有(you)(you)PC標(biao)(biao)志和(he)可以循(xun)環(huan)使用(yong)的(de)(de)標(biao)(biao)志。PET桶(tong)的(de)(de)表面坑(keng)坑(keng)洼洼，桶(tong)體(ti)看(kan)上去(qu)比(bi)較(jiao)(jiao)模(mo)糊(hu)，不(bu)(bu)是很(hen)透明，桶(tong)體(ti)一般標(biao)(biao)有(you)(you)PET標(biao)(biao)志，沒(mei)有(you)(you)循(xun)環(huan)使用(yong)的(de)(de)標(biao)(biao)志。這種有(you)(you)味(wei)道的(de)(de)桶(tong)采用(yong)了含有(you)(you)不(bu)(bu)適宜食品(pin)需(xu)要的(de)(de)化學物質(zhi)(zhi)(zhi)，這種物質(zhi)(zhi)(zhi)很(hen)容易融入到承載的(de)(de)食物中。

　　據2009年10月(yue)18日《消費者在購買(mai)桶(tong)裝純(chun)凈水(shui)請認準PC水(shui)桶(tong)》的(de)資料顯示(shi)：目(mu)前，市場上(shang)出(chu)現的(de)桶(tong)裝純(chun)凈水(shui)桶(tong)大多(duo)使用的(de)是(shi)PET桶(tong)，由(you)于(yu)該(gai)桶(tong)價格(ge)比較低廉，灌裝水(shui)價格(ge)僅相(xiang)當于(yu)PC桶(tong)的(de)1/4左(zuo)右，因此(ci)大多(duo)數生產(chan)企業“青睞”PET桶(tong)。但是(shi)PET桶(tong)達(da)不(bu)到衛生要求(qiu)，易變形，對(dui)人體有一(yi)定危(wei)害。 據不(bu)完(wan)全統計，目(mu)前，市場上(shang)的(de)大桶(tong)水(shui)所使用的(de)桶(tong)有百(bai)分之八(ba)十以上(shang)為非食品級的(de)，存(cun)在嚴重的(de)隱患，長期使用這種桶(tong)，無異于(yu)在慢(man)性中(zhong)毒。