I use a dedicated nonporous tray to catch any spills and have a roll of paper towels handy. Gloves and eye protection are advisable and I mix near my sink for safety. If you have kids/pets keep them out of the room and make sure you clean thoroughly, cats can absorb easily through their paws and kids will eat anything that doesn't eat them first!
Nix the funnels, flasks or cylinders, now take that money and buy 3ml or 6ml ldpe or PET bottles for testing recipes and get some Luer-Lok sringes with blunt tip 14 or 16 guage needles in different lengths (to get that last bit out of a bottle). Keep in mind that pipettes are designed for a single use, you're not able to clean them thoroughly! Add all your recipe ingredients straight into the test bottle and shake.
For testing flavors I use erasable labels from Wally World ($2-3 for 60 labels) with a fine point Sharpie. Alcohol and a Q-tip will erase them so you don't have to keep peeling off old labels (pita) plus you can put them in hot water when steeping without the writting/label coming off.
All of this is JMHO of course.