Pouring solutions of chemicals in the bottle, Amateurs are plastic or glass funnels. First trouble do not deliver: special ribs on the outer surface do not allow them to fit snugly to the necks, and displaced fluid with the air out of the bottles without interference. Edge for glass can be formed by bending, as shown in the figure, the cut copper wire Ø 1 mm.
A. KAMALOV, Obninsk, Kaluga region
Recommend to read
- UPGRADE SCREWDRIVER
The tightening of a screw into a solid material gives a lot of trouble. Enough only slightly to tilt the screwdriver as that breaks down, sometimes cutting slot of the screw. To avoid... - THE CYCLE OF RAZOR BLADES
Blades from the safety razor is often used as a kind of microcycle. But keep them in the hands uncomfortable and unsafe. Holder, shown in the figure, will significantly simplify the...