Peb yog cov chaw tsim khoom ntawm PET yas fwj rau ntau tshaj 10 xyoo. Peb siv peb cov kev paub dhau xyoo los muab ntau yam ntawm cov qauv PET fwj. Lub raj mis PET muaj kev vam meej muaj Boston Round, disc puag ncig, square, Oval thiab ob peb lub raj mis, muaj nyob rau hauv ntau qhov sib txawv thiab ntau lub caj dab txheem.