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The common paper holder is only used once and discarded. Actually, The paper holder can be used multiple times. but When Many people drink a coffee , they receive coupon and gather stamp.
SavingHolder have a dotted line on both sides
of the holder . It can be folded along the dotted lines for put the wallet like credit card. SavingHolder can be used as coupon.
After drinking the coffee, Fold the Saving Holder and keep in the wallet. and when you calculate coffee in next time, use
the 'Saving Holder' like a coupon. it can save a lot of resources that make another new paper holder.
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