In Commomwealth a cup has 250 mL.
In the US a cup has approx. 237 mL.
The customary unit of capacity for a bathtub is gallons.
Capacity isn't a unit at all. It's a characteristic, or a property of an item, which can be measured in whatever suitable unit. Capacity of batteries is measured in amp hours. Capacity of a gas tank can come in either liters or gallons.
A litre is a unit of volume.
There is no metric unit of capacity or volume that is equal to 1000 millimeters. This is because millimeters is length, and it has no relevance to capacity and/or volume.
You would use the metric unit "liters" to measure the capacity of a hot water tank.
Either milliliters (small teacup) or liters (large teacup).
Cup
Inches or Centimeters would be small enough to measure a teacup.
Half a teacup typically measures about 4 fluid ounces or 120 milliliters, assuming a standard teacup holds around 8 fluid ounces. However, teacup sizes can vary, so it's important to check the specific capacity of the teacup being used. In cooking and baking, it's often useful to use a measuring cup for accuracy.
The customary unit of capacity for a bathtub is gallons.
large heat capacity do not mean high in temperature. Both may have the same temperature but obviously the teapot has higher heat capacity compared to teacup as the teapot contain more than the teacup.Remember that heat capacity is directly proportional to the mass.
Capacity isn't a unit at all. It's a characteristic, or a property of an item, which can be measured in whatever suitable unit. Capacity of batteries is measured in amp hours. Capacity of a gas tank can come in either liters or gallons.
ca ca I think 6 ounces is a likely figure though some are smaller, I think.
Milliliters is the metric unit to use for the capacity of a thimble.
Capacity isn't a unit it is just a term that means how much a container holds. You can have metric units of capacity, such as Litres and Millilitres.
Metric
A millimeter is a unit of length, not a unit of volume or capacity. Perhaps you mean a cubic millimeter.