I just grabbed one of these too. Let me know if you have any bottle/squonk issues - and solve them. I'm still fiddling with it, as it seems to leak AIR when you squonk, like it's not really pushing as much liquid as it should... Also worth noting it's a BTCH to remove the bottle. Guess I'll HAVE to refill from the top...not something I usually do...
Bottle is tight for the first few fills, but loosens up. I like to squeeze a little juice up into the tube before I slide it in after filling.I've got 3 luna's and never noticed any air problems, maybe try the other bottle?