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No adhesive tape, string or rubber bands, this plastic container has a built in locking system!!!
(PS. i hope this simple instructable does'nt already exist...i looked all over the site to make sure)
This is an old DIY i came up with a few years back, to store my paint brushes and other art supplies. Basically i used to ride a bicycle 16km to art school for the first few years i was there. I needed a container that would keep my paintbrushes and paints safe in my back pack.

Step 1: Materials

Picture of materials
Materials:
1 plastic bottle with screw-on lid(thats going to be the locking mechanism)...i found that smaller 500ml bottles are more robust in the long run. However this does work with bigger bottles too, they just tend to wear out faster.
1 hacksaw..or any other tool that will be able to cut vertically down the mouth and upper neck of the bottle(through the threading) where the plastic is the thickest.
1 cutter blade
1 pair of scissors .. if needed for precision cutting

 
lord_kelvin2 years ago
nice idea!
chaitanyak (author)  lord_kelvin2 years ago
thanks!
haakon.k4 years ago
Ingenious! I love this. Now I'm going to spend the next weeks thinking of something I need just such a container for. Thanks!
chaitanyak (author)  haakon.k4 years ago
thanks!
put candy in there :D
striker1876 years ago
Nice!
theRIAA6 years ago
that's a really good idea... it would work great on all these squarish langer's juice containers i have...
chaitanyak (author)  theRIAA6 years ago
i actually did do this with a squarish juice bottle once(the kind that have the moulded handle) it works great, but for some reason the plastic in some of those bottles is prone to "tear" at the crease... so i didn't show that kind of bottle here. could try with engine oil bottles.. they might be made of stronger plastic
keng6 years ago
BTW: would work great with a metal hinge on big thick plastic as well!!!
chaitanyak (author)  keng6 years ago
yes it does, a friend of mine tried it and it works.
8bit6 years ago
Very inventive. I will try this.
keng6 years ago
I didn't think much of this when I saw the pic with the brushes, then I saw the big gallon jug idea and then the bottle with all the large (non-fit-through-the-hole-items) and I suddenly GOT IT!! awesome idea!!! Put this in the contest ASAP!!!