Wǒ gòuwùchē lǐ duī le yìduī Shuāngshíyī xiǎng mǎi de dōngxi.
My cart is piled with stuff I want to buy for Double 11.
Tips
usage
Same word for physical supermarket carts and e-commerce (淘宝, 京东, 拼多多) carts. 加购物车 ('add to cart') is the standard button label. Around big sales (双11, 618) 清空购物车 ('clear someone's cart', as a gift gesture) is a viral romantic trope.