Here is a simple Cynmar oder list for equipment you will find useful for yeast culturing. I don't have any affiliation with Cynmar, I just found their prices very competitive and they have just about anything you'll need:

Basic

• 11519905 - ERLENMEYER FLASK, BEST VALUE, 500ml, 6/PK. They only sell them as a 6 pack. Split the order with other brewers or keep them for yourself. They are good to have around.
• 11533101 - PYREX® HEAVY DUTY ERLENMEYER FLASK, 2000ml
• 13220697 - GLASS PETRI DISH, 75x17mm,10/PK, you may want to pick up more than one pack
• 11527906 - CLEAR GLASS VIALS w/AUTOCLAVABLE CAP, 12ml 12/PK, you may want to pick up more than one pack
• 12030036 - TEST TUBE BRUSH, WHITE NYLON, 3"BRUSH, 8" TOTAL
• 13225101 - NICHROME INOCULATING LOOP, 25 GAUGE WIRE, 8" TOT LENGTH
• 13225110 - NICHROME INOCULATING NEEDLE,25 GAUGE WIRE, 8"TOT LENGTH
• CHA80228 - DEHYDRATED AGAR POWDER, 30g, you can also try finding agar in a health food store for cheaper
• 12030895 - GLASS ALCOHOL LAMP w/CAP, 4oz, or use a propane torch or a gas stove

Advanced

• AFT49893 - LOW PROFILE MAGNETIC STIRRER, 130-1800rpm, you can also build your own, check eBay or other sources.
• 15023293 - STIRRING BAR w/CENTER RING,TEFLON COATED,1 5/8 x 5/16"