Sometimes some of our suppliers are based in Germany, in order to keep the prices competitive. If this is the case, we deliver a free mini adapter with the goods, which you simply clip onto the European plug and off you go! This makes absolutely no difference to its use. The plug is only slightly longer.

Mine has 2 buttons.

On the Digitec product page for this machine, scroll down quite far to the "90 coffee free" section.

Hello. you will find all the information at the bottom of the article, under the tab 100 coffee free. It is a Nespresso promotion. So register your machine until 13.02.2022 under the given link and the 100fr will be credited to your nespresso account. if you then order capsules you can redeem the credit. The credit of 100fr will be divided between two orders, i.e. 50fr per order. Details URL https://promotions.nespresso.ch/ Valid from 21.10.2021 Valid until 09.01.2022 Deadline 13.02.2022

We asked about this directly and found out that Nespresso has extended the promotion by one week until 22 August.

Hello. All the information is provided with the product below under the tab "Nespresso Capsules": Nespresso Year End Promotion Offer valid on the purchase of a Nespresso coffee machine (excluding Nespresso Professional and Nespresso Vertuo). Between 22 October 2020 and 3 January 2021, Nespresso will give you coffee capsules of your choice worth CHF 90, spread over your next three coffee orders. From registration until 31 January 2021, you will receive free Nespresso capsules worth CHF 30 with each of your next three coffee orders. Nespresso will also waive the shipping costs for all three orders. The offer is limited to the purchase of a maximum of 3 Nespresso coffee machines per purchase receipt and per Nespresso customer account.

Only a material tester can answer that question. For ordinary mortals, the tank is made of plastic.