What are Empty Tubs? BULK POWDERS™ reusable Empty Tubs are ideal for storing or transporting your powders in. They are manufactured from food-grade plastic & are completely airtight once sealed. We recognise that our re-sealable pouches do not suit everybody. In light of this we now offer a range of Empty Tubs, which can be used as an alternative to our pouches. Each Empty Tub is food-grade, supplied with a lid & totally reusable. How much powder does each tub hold? The amount of