Introduction: Cement and bricks manufacturing process will contribute to a high emission carbon- dioxide (CO2) that may lead to global warming. The alternative way thatcan solve the problem is replacing by the use of bricks in construction by plastic bottles filled with sand, mortar and other types of materials. Objective: The purpose of this study is to examine the possibility of using plastic bottles in concrete block. The plastic bottles are used to reduce the cost, Environmental effects and the usage of concrete in the masonry units. Method: Concrete is placed around each bottle to encase it in the masonry units. The study utilizes 500-mL plastic bottles filled with soil and cement mortar placed inside concrete masonry units and analyzing the compressive strength. The testing for compressive strength was determined according to the ASTM C140 standard. Result: This study shows Soil Brick Block and Mortar Brick Block has a similar average compressive strength of 4.6 N/mm2 and 4.4 N/mm2. This abruptly high compressive strength of soil brick block is found due to the ‘Confinement Effect’ shown by the plastic bottle. Thus the use of concrete can be reduced, introducing the soil bottle brick in concrete masonry. Conclusion: Further research on the other properties, economics and environmental benefits can be conducted to confirm the practice of using water bottles inside concrete blocks. And this study recommends the Soil Brick Block can be used in footpath, river banks and other such structures where only high compressive strength is necessary.