Melted until they became liquid, and with my mom's pot holders, we were pouring the lead through a small hole in the top of the milk cartons.
直到变成液体，这时我们就用妈妈的锅垫垫着，将铅液从牛奶盒顶的小孔中倒进去。
英语百科
Pot-holder
（重定向自Pot holder）
A pot-holder is a piece of textile (often quilted) or silicone used to hold hot kitchen cooking equipment, like pots and pans. They are frequently made of polyester and/or cotton. Crocheted pot-holders can be made out of cotton yarn as a craft project/folk art.