Boyz Toys GEOWC Geocaching Tub These tubs come in two different sizes, the cartons will be mixed sizes. Please note the lids are loose in the carton, once clicked on, the container becomes airtight and secure, on opening the secure seal needs to be broken, once broken the container can be reused. Features: Sizes of each container are: - 49mm x 75mm. - 49mm x 92mm.