Step 1: What You Need
a glass bottle , small amount of shells and as much sand as you want.
Step 2: In Goes the Sand
make a paper funnel to pour your sand in.I used about a quarter of a cup of sand , although it is your decision.
Step 3: Shells
just drop them in and it will look natural , that's it enjoy ………pss and please vote this instructable for any competition's , thx