Early Quenya
salpa
noun. bowl
salpa-
verb. to take a sup of, sample, sip
tolpo
noun. bowl
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A word appearing as ᴱQ. tolpo “bowl” in Early Qenya Word-lists of the 1920s (PE16/142). The Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s instead had ᴱQ. salpa “bowl” derived the early root ᴱ√SḶPḶ (QL/84).
Neo-Quenya: I would use the later word ᴺQ. tolpo as the Neo-Quenya word for “bowl”, since later ON. salpha from the 1930s was “broth” rather than “bowl” (Ety/SÁLAP).