toothpaste

tuba

is a paste that comes out in caterpillars.

67. La oruga del dentífrico. A caterpillar of toothpaste.

is never something you really run out of - you run out of willpower to squeeze it out.

You never run out of toothpaste, you run out of willpower to squeeze it out

is a thing where the last 5% of the tube lasts about as long as the first 95%.