50ml/up 19 * down 19 (2)=capacity of 50ml, upper frosted mouth diameter of 19mm, lower frosted mouth diameter of 19mm. Quantity is 2. The other options have similar meanings. 500ml/up 24 * down 24 (1)=capacity of 500ml, upper frosted mouth diameter of 24mm, lower frosted mouth diameter of 24mm. Quantity is 1. The other options have similar meanings. 100ml/up 24 * down 40 (2)=capacity of 100ml, upper frosted mouth diameter of 24mm, lower frosted mouth diameter of 40mm. Quantity is 2. The other options have similar meanings. 500ml/up 24 * down 40 (1)=capacity of 500ml, upper frosted mouth diameter of 24mm, lower frosted mouth diameter of 40mm. Quantity is 1. The other options have similar meanings. The design notice for the glass storage ball includes a spherical container. Connect a long neck at the top. A long neck can be used for pouring fluids and assembling other accessories.