I have a few small sucrets boxes that I keep things in in a small tool bag. A zip tie is secured around each one and it keeps it closed very nicely.....it also slips on and off easily since the 'case' is smooth plastic. So I have it securely fastened and easily accessible....a nice balance.....

From an earlier post I'll add......a nice 'source' (at least for me) for some of the large/thick zip ties....though already used...7-11 or the gas station....they use them to hold up their signs.....when they pull the sign down the tie usually stays behind.....I've asked and been granted permission to remove some when they are building up on the pole. They hold several of my containers closed....just remember they are 'used' so if you do get a few....use good judgement in their suitable uses.....