These are 9 oz without tube and valve, the other set 5 oz with tube and valve. Both are for sensitive tummy, 'closer to nature' type which claims to be mimicking breastfeeding, reduce gas, colic and spit ups.
If you wanna know more, you can read it here http://mobile.walmart.com/ip/36023770?wmlspartner=wlpa&adid=22222222228025124319&wl0=&wl1=g&wl2=m&wl3=42530220752&wl4=&wl5=pla&wl6=81187068632&veh=sem