Our family and friends used two sets of these in our Jubilee Street Party.
The 23cm (9inch) paper plates are durable enough to support a normal party meal eg banger + burger + baked potato + salads.
The paper cups hold hot and cold drinks without leaking, and don't alter the taste.
The thin paper tablecloth at 120cm (4foot) by 180cm (6foot) is amply big enough to cover a picnic table, and it is quite absorbent but will survive minor spillage.
The napkins are very absorbent, and tend to disintegrate rapidly when wet.
Our party went well, and fortunately the rain waited until after the meal but this showed how just how quickly the table cloth and napkins could dissolve into pulp.
As ephemera these patriotic party pieces served their purpose admirably.