Have you seen the price of Sippy Cups? They aren't cheap and I try to grab them when Asda or Tesco have their Baby and Toddler Events on. Even then they aren't super cheap, but I have found a fantastic offer at Amazon. The Fisher Price Sippy Cup Set is only £5.41 instead of it's usual £12 price.
The Fisher Price Sippy Cup Set consists of a Baby's First Sippy Cup and is suitable for age 4M+ (5oz/147ml), a Two Grip Travel Sippy Cup suitable for age 6M+ (8oz/236ml) and a 3 Flow Sippy Cup suitable for age 6M+ (8oz/236ml).
Sippy Cups are an essential in my eyes. It's for when baby is coming off of the bottles and to train him/her to use proper cups. Without them, we would have houses that were stained with blackcurrant juice and sofas that smelt of sour milk.
You can have the Fisher Price Sippy Cup Set delivered for FREE when you spend £20+ or have Amazon Prime. If you don't want to spend as much as that and you aren't a Prime member then delivery is £3.99.