By old style bottles do you mean ones that look like these?

Original sodastream Three Pack 1 Liter Carbonating Bottles - Lasts 2 years - Purple, Blue, and Green https://smile.amazon.com/dp/B00IS2V7LI/ref=cm_sw_r_cp_api_glt_fabc_4R1PHMTMB4RJSHTYBP0F