Review (4/5): What you can do is put a dab on the top and squeeze the bottle and it will suck it into the tube
Holes are very small to get product into but if its lotion or such...What you can do is put a dab on the top and squeeze the bottle and it will suck it into the tube...I learned that trick on accident so thats how ive been getting product in them and always wear gloves of coarse if you are doing samples...for good customer service!