纸杯

Pinyin: zhǐbēi
Meaning: Paper cup
Sentence: 然后倒入4盎司大的制冰格或纸杯，插入木棍儿，冰冻成固体就成了。Pour into 4-ounce pop molds or paper cups, insert sticks, and freeze until solid.

More:

纸：

Pinyin:zhǐ

Meaning: Paper
Radical: 纟
Stokes: 7
Traditional: 紙
Common words/Phrase:
纸牌 [zhǐpái] 【playing card】
纸浆 [zhǐjiāng] 【paper pulp; pulp】
纸币 [zhǐbì] 【paper currency; bank note】
纸盒 [zhǐhé] 【carton】

杯：

Pinyin: bēi
Meaning: cup
Radical: 木
Stokes: 8
Traditional: 杯
Common words/Phrase:
杯子 [bēizi]【cup; glass】
杯垫 [bēidiàn] 【tablemat】
杯水车薪 [bēishuǐ-chēxīn]【an utterly inadequate amount】
杯弓蛇影 [bēigōng-shéyǐng] 【be jittery with imaginary fears】