Kawaii cute bottles of Halloween potions, with ghost vapours escaping out of them. Witches hat, skull and pumpkin potions.
Where to buy online
TeePublic (US and UK)
Threadless (US)
RedBubble (US)
NeatoShop (US)
CloudCity7 (UK)
Design By Humans (US)
PopupTee (US)
You can find the design on t-shirts in most stores, but also on other products depending on the store (e.g. hoodies, mugs, stickers, notebooks, phone cases, greeting cards, cushions, socks etc).