Hello all I have acquired two baby bottles both with stoppers but not sure they were meant as a match. The bigger of the two bottles, the stopper locks in this one also has a number 30 on the bottom and another mark but cannot work it out. Someone has put a home made sticker on it which states Maldives. The little bottle has a number 15 and has a homemade sticker saying Lybie which I believe is Africa. Both have concaved bases. What were they for a tiny tipple maybe but it must have been really tiny! Any info at all appreciated.