So my current DIY mixture consists of: *1/4 tsp yeast *1/4 tsp baking soda *2 cups sugar This lasts me about 8-9 days maximum, so now that I got my DIY setup is settled and working fine without any issues I am going to start experimenting with different mixes. I have read up on the life cycle of yeast and the reason why yeast dies after a set amount of time is due to the alcohol levels reaching levels that kill the yeast. So when my current mixture has run out I am going to instead of just normal white sugar use a mixture of 1 cup brown and 1 cup white. And instead of normal yeast I will be using brewers yeast. The reason behind this is that brewers yeast is far more tolerant of high levels of alcohol so in theory my mixtures would then last longer. After that I will move onto wine yeast and see what kind of results I get with that ideally I am looking at extending my range to between 2-3 weeks for my DIY CO2 mixtures.