What are the seemingly insignificant products in a grocery shop that sell very well?

[Fidelia]

There are silent products in a grocery shop but they sell well. They are not products that are flashy but they easily run out of stock in a grocery shop. Which products are like that? Gums is a typical example of those products for me. What do you think is not loud in a grocery shop but sells well?

 

[Kera]

Finger batteries are not those products that are loud. They steadily sell large volumes everyday in a grocery shop.

 

[Augusta]

Can openers, particularly those with multiple functions, can be surprisingly popular

 

[Kera]

Toilet tissues is one product that doesn't ring a bell in a grocery shop but the demand is very huge for it.

 

[Augusta]

Same with sanitary pads. Alot of sales of this is made but it is often disregarded as nothing