See this cute Samantha Thavasa Aimi bear keychain??? It was free with a ¥100+ drink at FamiMa!!!
Lipton often collaborates with big brands to offer cute keychains for free- for example Pierre Herme, Fauchon, and some big hotels. Samantha Thavasa is just one of many. This gives commoners a chance to own something with a big brand name slapped on it (or just something more than likely to be very very cute), for 0% of the price it'd otherwise cost (and lower quality, of course).
There are many designs to choose from, and I got the only bear left in the FamiMa I was at.
If you're in Japan, you should hope that Lipton has some ongoing collaboration promotion and snag a cute souvenir! (For the record, I didn't drink the lemon tea... orz)