Ua los ntawm qib zaub mov, TPR (BPA dawb), tsis muaj tshuaj lom, tsis muaj tshuaj tsw qab, muab cov khoom ua si zoo tshaj plaws rau koj cov menyuam dev.Tsis yooj yim rau tawg ua rau choke txaus ntshai vim spikes ntawm lub pob muaj ib tug tsis.Qhov txiaj ntsig ntxiv yog pab kom lawv cov pos hniav thiab cov hniav ntxuav.