Help with "soothie" brand bottles!!!?

my 8 month old son will only use soothie brand bottles; i ume he likes the wide . but our problem is he pops the nipple into the bottle therefore spilling all his formula all over him, his crib, his swing, his carseat; wherever he may be. if i give him a "normal" sized bottle like playtex, etc he looks at me like im crazy and will chew it for a bit then toss it aside. he has gone an entire day with no formula before due to refusing a playtex bottle. any suggestions on how to keep the soothie from popping in like that? anyone else had the same problem someone please help!! im tired of taking his swing, bouncer, exersaucer and carseat apart to wash daily!