X-Chef Mixing Bowl Set | $23 | Amazon | Promo code OLQPTHBV
Photo: Amazon

No kitchen is complete without a good set of mixing bowls, and this 10-piece stainless steel collection (five bowls and five lids) is a steal at $23. They even have measurement lines etched on the inside so you end up with <very Great British Bake-Off voice> a good bake.