For sale and purchase of old glass bottles

Need some urgent answers - Our Business is closed from last 7 days Sir, I am a dealer of Old Empty Glass Bottles(used) for liquor industry. We buy bottles from unregistered parties as well as registered parties and sell to registered companies. Also Liquor companies are out of GST thus they will not get Input Tax Credit of our supply. Nature of our business ( We buy mixed bottles , seaggregate them and Supply to the respective liquor companies which have different purchase price for each bottle ) #1 How should we purchase old bottles from unregistered parties? Is there any reverse charge? #2 How should we purchase old bottles from registered parties? Will we give him Tax Credit? #3 As for second hand goods there is a margin scheme being implemented. What is its effect? #4 So if we paid tax to registered parties on purchase and we sell to liquor companies which are out of GST and thus we will not get any Input Tax Credit on it, then the tax paid by us will how be credited to us?