The logo should remind to Bubble Tea (e.g. a cup, a straw, Bubbles or anything else). And under the main title Sip&Go there should be the slogan Bubble Tea & Co.
Also logos with a touch of Asia are welcome but it is not a must.
If possible do not use more than three colors.
It should also look good if printed on a black background or other colours if possible.
And nothing in the logo that reminds to Switzerland (no mountains, no Swiss signs, symbols, etc.).
It should be a strong, fresh, catchy and young logo that everybody can associate with the first bubble tea brand in Europe (the one and only).