Related for Eruvin 58:4

א"ר זירא אמר שמואל שכר מערבין בו ופוסל את המקוה בשלשת לוגין מתקיף לה רב כהנא פשיטא וכי מה בין זה למי צבע דתנן רבי יוסי אומר מי צבע פוסלין את המקוה בשלשת לוגין אמרי התם מיא דצבעא מיקרי הכא שיכרא איקרי

And with what quantity [of beer] may an erub be prepared? - R'Aha son of R'Joseph proposed to say before R'Joseph: With two quarters<span class="x" onmousemove="('comment',' Of a kab. One kab = four log.');">¹²</span> of beer, as we learned, 'If a man carries out<span class="x" onmousemove="('comment',' On the Sabbath from a private into a public domain.');">¹³</span> wine [he incurs guilt if its quantity was] sufficient for mixing the cup',<span class="x" onmousemove="('comment',' Shab. VIII, I, sc. if the cup of benediction (v. infra) can be filled with the wine, after the quantity of water, that is required for its dilution before it can be drunk, has been added.');">¹⁴</span> and in connection with this it was taught: '[It must be] sufficient for mixing a handsome cup. What [is meant by] 'a handsome cup'?

Tosefta Terumot