It's been a while since we've had a collaboration event that seems close enough to participate in.

https://x.com/round1_fanevent/status/2075490562019606570?s=20
Since merchandise is only being sold at 4 stores, the only ways to participate seem to be getting a coaster by drinking the collaboration drink, or participating in the collaboration pack campaigns for bowling, karaoke, and Spocha.

I feel like the collaboration pack would be quite difficult to do alone. If I were to participate in the collaboration pack, I'd rather get the coaster from the collaboration drink, so I'll probably do it later. The collaboration drink is only available if you participate in the collaboration pack.

Round1 collaboration with Oshi no Ko | なおなお's post