uncontable nouns

Foods and drinks:

water, beer (cerveja), wine (vinho), tea (chá), coffee (café), etc. - a glass, a bottle, a jug, a cup of.
milk (leite) - a carton/bottle of milk (uma embalagem/garrafa)
bread (pão) - a loaf/piece/slice of bread; a loaf; a roll
cheese - a slice, a chunk, a piece of cheese (uma fatia/pedaço de queijo)

meat (carne) - a piece, a slice, a pound of meat
butter (manteiga)- a bar of butter (um tablete de manteiga)
ketchup, mayonnaise, mustard - a bottle of, a tube of.
chocolate - a bar of chocolate (um chocolate, uma barra de chocolate)
sugar - a loaf/ loaf sugar (açúcar em cubinhos)
rice (arroz) - a bowl of rice (uma tigela/um prato de arroz)
pasta (macarrão, massa) - a plate of pasta, a serving of pasta
chewing gum ( goma de mascar) - a piece of chewing gum (e não a chewing gum)