if you just unscrew the lids very slightly it does the same thing just loose enough that is you squeeze the bottle air comes out i have done 100's of bottles like that and never lost 1 tighten the lid when the ferment is over i normally rack into a second bottle and age but that is optional
I have done a few pineapple ciders by boiling several (about 10) peeled and diced pineapples in water for about 2 hours then filtering through a muslin cloth and fermenting the liquid with about 1kg of sugar and 10L water. they ferment well don't worry about that the taste is OK tastes like...