If you wonder where to get these adorable small bottles that are so popular at baby showers and weddings, have a look at Shop Sweet Lulu on Etsy. They also carry the traditional French square bottles.
Shop Sweet Lulu also sells wooden ice cream spoons, dots and stripes birthday candles, nice striped straws, polka dot party cones and baking cups with cute festive patterns that you can use to serve candies, ice cream as well as cupcakes.
If you need a large number, you may be better to buy your beverage bottles in bulk. I found the square bottles in different formats at SKS Bottle & Packaging.
+ 8 oz. Round Bottles, $12 USD for 4 at Shop Sweet Lulu
+ 8 oz. French Square Bottles with a black plastic cap, $16 USD for 4 at Shop Sweet Lulu
+ 8 oz. French Square Bottles without caps, $66.36 USD for 84 at SKS Bottle & Packaging
+ Flat Wooden Ice Cream Taster Spoons $2 for 20 at Shop Sweet Lulu
+ Polka Dot Candy Cups $4 for 20 at Shop Sweet Lulu