No-spill containers can be constructed quickly from plastic water bottles. In the picture I used 8 oz. bottles. I cut the threads off the top and then cut the conical part of the bottle off. You can use a knife but you'll have much better control on this thin plastic with a fine circular saw blade mounted in a Dremel tool. The conical portion is then inverted into the bottle base and glued in place. Voila, a no-spill container.
If you use this for cutting oil, you may be tempted to put a magnet into the bottle base before cementing the top in place. That will work but be forewarned that this means the bottle will attract swarf.
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