Before I got the 1 gallon kosher dills in a glass jug to wash my yeast in,I'd been saving those Tostitos dip jars from the grocery store. I poured in about 2C of sanitized water into the fermenter & swirled all the yeast & trub loose. Then sanitized the dip jars & poured the mess into the jars,labeled,& into the fridge. They'll keep in the fridge fine,but don't leave'em in there more than 2-3 days. The yeast can than flake & clump come washing time & got to the bottom.
Fill the 1G pickle jar about 2/3-3/4's full with boiled & cooled water,dump the slurry in,& wait. The trub will settle out. I just posted an article on "easy yeast washing" in the articles forum in that lil red strip at the top of the forum page with pics if you need more details. As long as there wasn't any suckback,your yeast is safe.