Where can I find the toothpaste roller?

[Lala2]

Anyone knows where i can find toothpaste roller? (the one that helps squeeze out the toopaste the from the tube)....costs abt $2 per roller...

pls let me know...i seen it at some temp stores but I can't seem to find it now...

[jpatokal]

Today's math problem: if a toothpaste roller lets you squeeze an extra 1% out of the tube, and toothpaste costs $2 per big tube, how much toothpaste do you have to use up to earn back the $2 for the roller?