Frozen fruit
When it comes to frozen fruit, one employee said, "Costco is so much more cost efficient."
And frozen items in general
A different employee said that they find the frozen items too pricey.
"That's where a lot of money is made," the employee told Business Insider.
Produce
One employee said that they didn't find the produce at Trader Joe's to be a particularly savvy purchase, saying that they could find good quality vegetables and fruits for a better price elsewhere.
Pickle-flavored popcorn
And yet another worker admitted that "some stuff is just not my cup of tea" when it comes to the store's quirkier products. They specifically called out the bags of pickle-flavored popcorn sold within the store.
"Who needs that?" the employee asked.