The podee bottle is a little large, so we use the tubing with a playtex bottle..the nipple is kind of funky too so we switched it out with one from the hospital..one of my preemie twins does very well with it, the other not so much..but at least it frees up some time if they want to feed together.. I sit on the couch with my podee baby inis bopee and feed the other one in my lap.. It works very well..the bottom tubing is ling, so u may also want to buy the replacement box of tubes so u can use a smaller tie on bottom if u want to use a 4 or 6 oz bottle..