The yellow thing on top is so the glue doesn’t dry at the tip and seal up the applicator. I get the bulk supply of this glue, I haven’t had to buy any in two years lol
One time I got nail glue in my EYE and I rushed to the kitchen to try and get it out and I accidentally touched the burning hot stove and got a 2 degree burn but I got the nails glue out and there was just some iratation in my eye so ya