using 30-35 oz cups
 

hey Ron, George from crescent city fl.saw a post from one of the members (no name or email) concerning cutting the 2 litre btls.longer & using 30-35 oz cups to allow for more root growth. question is,does "solo" make this size cup or is the member using another type? would like to pursue this idea as i have had a problem with the 16 oz.not large enough for the root system or support for some vegetable plants. good growins,george

I would check at those discount stores that sell inexpensive plastic glasses of all sizes. You still will have to burn holes with your soldering iron but they will last a lot longer then solo cups