Tableware needs to be tested for its resistance to water absorption.
The standard and most effective method is to do this under vacuum

The Vacuum Water Absorption equipment comprises :-
Large Vacuum Dessicator
Vacuum Pump
Vacuum Guage
Water reservoir (for degassing water) (approx. 2 litre Capacity)
Associated pipework and fittings
Stainless Steel Beaker (1 litre)

You will also need a top pan balance with a readability of 0.001 grams and sufficient capacity to weigh the samples under test,
Laboratory Oven and a hot plate

Vacuum Water Absorption Kit - TWWA
(Does not include balance, oven or hotplate which can be supplied separately if needed)