Review on Antrader Bathroom Overflow Covers Insert by Jeremy Black

Reading all these negative reviews I can't fucking understand why people try to use overflow caps in their drains. The product says 'spill cap' and if you measure you will get it (but you should still have got it). The overflow or vent holes in many sinks can be 1-3 holes. That's why many companies will send you 3-packs. The holes are under the faucet at the top of the sink. Serious? How can you buy the wrong part for the wrong thing and then throw that part away because it doesn't fit something it wasn't originally made for? How did it get so damn popular that user error is now always manufacturer error? Serious?