the d-battery stash cans suck, sorry to say they dont really look much like batteries, but from a distance they will work.
in highschool i used a pipe that i bought from a local head shop designed to fit into a marksalot marker. it fit in any marksalot so i got a bigger one and could stash a nick or so and my pipe. i had teachers take a good look at it (i thought i was screwed) and never had a problem
soda can stash jars are easy enough to make but you need a few things
a fine tooth hacksaw
a soda can
a small jar with a screw on lid
some liquid nails
simply take a full soda and cut the top off just below the bevel with the fine hacksaw ( make the first cut slowly as soda will shoot out) be careful not to work too fast or you can scratch the can and it wont look right.
now that you have to peices clean them with soapy water and dry them. ten glue the lid of the jar to the underside of the can lid using liquid nails. let it dry
next screw the jar to your lid assembly
fill the hollowed out soda can 1/3 or so with liquid nails (try to get the weight similar to if it were full of soda)
place the jar and lid assembly into the hollow can and make sure the lid and can fit flush, so you cant see any gaps.
tape it off and let it sit overnight.
now your done all you have to do to get to your stash is unscrew the top of the soda can
