If you feel the need for sweet, sugary liquid refreshment as you inevitably will while in India, send the multinationals a poke in the eye by buying this local cola.
It's got a taste all of its own and is more likely to come in a recyclable glass bottle than the rival brands. Despite being owned by Coke now, Thums Up will still contribute more to the indigenous economy too.
So aside from Pepsi everyone's a winner. I'm sure they'll be OK.
Street stalls, advertised by the big red Thums Up logo
Updates
Is this your business?
But wait, you know that. Not quite sure how buying Thums Up will contribute more to the local economy than buying Coke/Pepsi, but ...
I actually like the taste of Thums Up (much less sweet than Coke/Pepsi in India), so I do recommend trying it.