Sun Cups' desire for nut-free and gluten-free food started at home. Among the three of them (Rick, David and Neil) they are either sensitive to gluten and nuts or have family members with allergies. To make sure they can eat everything they create, they have established a 100% nut- and gluten-free manufacturing shop, and their entire supply chain is completely nut- and gluten-free. The chocolate manufacturer who grinds and blends their chocolate doesn't allow any nuts in the same building as their chocolate. Their employees can't bring peanut butter sandwiches to work, and they have "inside shoes" so nothing gets tracked into the shop. (It keeps the floors cleaner, too!) They test for peanut allergens in their batches of incoming ingredients using lateral flow test kits. The seeds for their sunflower butter are grown in the upper Midwest, where it's too cold to support peanuts, so they can't volunteer in the fields.