I've a bit of a headache at the moment so I can't read through all the posts to see if this was suggested already, but when I have a need for extra stealth - I use an Oral-B Ultrafloss container...http://www.oralb.com/products/product.asp?tid=products&sub=flossinterdental&cid=flossinterdental&pid=ultrafloss
...long link.

It comes apart very easily and you take the large roll of floss out (very good floss too, btw

) put it aside for now. Put your meds in the bottom of the container (not too many to make it too heavy) and pack on top with some cotton balls. Take the floss youve put aside and wrap ~2 ft around something like a pencil or finger...etc. Slide it off and put inside the container, then feed it into the hole. If you do it right - you can pull on the floss and it works just like normal

Might be too much for some - but I was quite proud of myself when I first thought of it.