Lightweight, narrow-based plastic bottles are so unstable and it is easy to spill quite expensive contents! Perhaps that is what the manufacturers want you to do! Well, I have done it far too often. These forged ovals help to prevent knocking over a bottle when the top is removed for making repeated applications. I am going to make some more to fit other bottles. They are just tight enough to fit without undue distortion. The one on the right, which I did first, has cling film around it because the the plastic is also brittle! Why?....
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