Film cans with lids. 
They are made of hard plastic, which means that the containers does not bend if you happen to be a bit rough. The lid is firmly attached and there is no risk of it falling off. The jars are very waterproof, which we have of course tested. 
 
In addition to storing film rolls in these, they are also perfect for Geocaching. If you put a magnet in them, they can be attached to/in signs, under window sills, behind downspouts or on other magnetic surfaces. With a steel tree around, they can be hung on signs, on branches or in other ingenious places. Film cans are therefore very practical and can be had a lot of fun with!
 
Height: approx. 55 mm
Diameter: approx. 30 mm