for those of u who know about making your own sandbag or medicine ball u gota help me in this. For those of u who dont know...check out rossboxing.com its all there.. but anyways : i was just wondering if theres an alternative for the zip lock bags or the contractor bag coz i cant seem to find it anywhere: Home depot etc. (i live outside US). I find the normal ziplock bags but theyr never strong enough. The only contractor bag i can find is those normal ttrash bags but i dont think theyll hold. So yea..wat do u recommend?the only ziplock bags i can find are the ones for food... yes i went to hardware stores..but the country i am in right now is crap..we have all these..malls...bars..beachers...etc. but we dotn have these simple stuff..so yea.l.anways.. the ones i can find is ziploc storage bag..and ziploc freezer bag www.ziploc.com/ about the medicine ball...if i were to buy wat size..wat size SHOULD i get? is 10lbs enough>.? i read i should get between 8-12lbs...i fiugre go for 10lbs..but wat about the 25?should i get that EVEN though im already making a sandbag?